022-bone_density

Bone size, mineral and density (DXA) dataset

Bone density was profiled based on DXA imaging, and includes measurements of mineral content in different parts of a variety of skeletal components.

DXA (dual-energy x-ray absorptiometry) imaging is a method used to measure bone density and mineral content. A DXA scan uses a low dose of ionizing radiation to produce a detailed image of the body, specifically the bones. The scan is then analyzed by a software to determine the bone mineral density (BMD) and bone mineral content (BMC) in different parts of the body. This method is considered to be one of the most accurate methods for measuring bone density, as it is able to provide detailed information about the distribution of bone mineral content in different bony structures of the body skeleton. The spine and hip are most commonly measured because that is where most osteoporotic fractures occur. DXA imaging is commonly used for assessing the risk of osteoporosis, a condition characterized by low bone density and increased risk of fractures, and for monitoring the effects of treatments for the condition.

Data availability:

The information is stored in 1 parquet file: bone_density.parquet

from pheno_utils import PhenoLoader

pl = PhenoLoader('bone_density')
pl

PhenoLoader for bone_density with
289 fields
2 tables: ['bone_density', 'age_sex']

Data dictionary

pl.dict

	folder_id	feature_set	field_string	description_string	relative_location	field_type	bulk_dictionary	bulk_file_extension	data_coding	stability	units	sampling_rate	strata	sexed	array	list_of_tags	debut	transformation	pandas_dtype	completed
tabular_field_name
collection_date	22	bone_density	Collection date (YYYY-MM-DD)	Collection date (YYYY-MM-DD)	bone_density/bone_density.parquet	Date	NaN	NaN	NaN	Accruing	Time	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	datetime64[ns]	NaN
timezone	22	bone_density	Timezone	Timezone	bone_density/bone_density.parquet	Categorical (single)	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	string	NaN
collection_timestamp	22	bone_density	Collection timestamp	Collection timestamp	bone_density/bone_density.parquet	Date	NaN	NaN	NaN	Accruing	Time	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	datetime64[ns, Asia/Jerusalem]	NaN
body_arm_left_area	22	bone_density	Body arm left area	Body left arm area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arm_left_bmc	22	bone_density	Body arm left bone mineral content	Body left arm bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arm_left_bmd	22	bone_density	Body arm left bone mineral density	Body left arm bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arm_right_area	22	bone_density	Body arm right area	Body right arm area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arm_right_bmc	22	bone_density	Body arm right bone mineral content	Body right arm bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arm_right_bmd	22	bone_density	Body arm right bone mineral density	Body right arm bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arms_area	22	bone_density	Body arms area	Body arms area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arms_bmc	22	bone_density	Body arms bone mineral content	Body arms bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_arms_bmd	22	bone_density	Body arms bone mineral density	Body arms bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_dose	22	bone_density	Body dose	Body dose	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	μGy	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_head_area	22	bone_density	Body head area	Body head area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_head_bmc	22	bone_density	Body head bone mineral content	Body head bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_head_bmd	22	bone_density	Body head bone mineral density	Body head bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_left_area	22	bone_density	Body leg left area	Body left leg area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_left_bmc	22	bone_density	Body leg left bone mineral content	Body left leg bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_left_bmd	22	bone_density	Body leg left bone mineral density	Body left leg bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_right_area	22	bone_density	Body leg right area	Body right leg area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_right_bmc	22	bone_density	Body leg right bone mineral content	Body right leg bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_leg_right_bmd	22	bone_density	Body leg right bone mineral density	Body right leg bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_legs_area	22	bone_density	Body legs area	Body legs area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_legs_bmc	22	bone_density	Body legs bone mineral content	Body legs bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_legs_bmd	22	bone_density	Body legs bone mineral density	Body legs bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_pelvis_area	22	bone_density	Body pelvis area	Body pelvis area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_pelvis_bmc	22	bone_density	Body pelvis bone mineral content	Body pelvis bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_pelvis_bmd	22	bone_density	Body pelvis bone mineral density	Body pelvis bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_ribs_area	22	bone_density	Body ribs area	Body ribs area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_ribs_bmc	22	bone_density	Body ribs bone mineral content	Body ribs bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_ribs_bmd	22	bone_density	Body ribs bone mineral density	Body ribs bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_spine_area	22	bone_density	Body spine area	Body spine area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_spine_bmc	22	bone_density	Body spine bone mineral content	Body spine bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_spine_bmd	22	bone_density	Body spine bone mineral density	Body spine bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_area	22	bone_density	Body total area	Body total area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_bmc	22	bone_density	Body total bone mineral content	Body total bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_bmd	22	bone_density	Body total bone mineral density	Body total bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_left_area	22	bone_density	Body total left area	Body total left area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_left_bmc	22	bone_density	Body total left bone mineral content	Body total left bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_left_bmd	22	bone_density	Body total left bone mineral density	Body total left bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_right_area	22	bone_density	Body total right area	Body total right area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_right_bmc	22	bone_density	Body total right bone mineral content	Body total right bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_total_right_bmd	22	bone_density	Body total right bone mineral density	Body total right bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_area	22	bone_density	Body trunk area	Body trunk area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_bmc	22	bone_density	Body trunk bone mineral content	Body trunk bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_bmd	22	bone_density	Body trunk bone mineral density	Body trunk bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_left_area	22	bone_density	Body trunk left area	Body left trunk area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_left_bmc	22	bone_density	Body trunk left bone mineral content	Body left trunk bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_left_bmd	22	bone_density	Body trunk left bone mineral density	Body left trunk bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_right_area	22	bone_density	Body trunk right area	Body right trunk area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_right_bmc	22	bone_density	Body trunk right bone mineral content	Body right trunk bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
body_trunk_right_bmd	22	bone_density	Body trunk right bone mineral density	Body right trunk bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_lower_neck_area	22	bone_density	Femur left lower neck area	Femur left lower neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_lower_neck_bmc	22	bone_density	Femur left lower neck bone mineral content	Femur left lower neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_lower_neck_bmd	22	bone_density	Femur left lower neck bone mineral density	Femur left lower neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_am_percent	22	bone_density	Femur left neck age-matched percent	Femur left neck age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_area	22	bone_density	Femur left neck area	Femur left neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_bmc	22	bone_density	Femur left neck bone mineral content	Femur left neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_bmd	22	bone_density	Femur left neck bone mineral density	Femur left neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_t_score	22	bone_density	Femur left neck t-score	Femur left neck t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_ya_percent	22	bone_density	Femur left neck young-adult percent	Femur left neck young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_neck_z_score	22	bone_density	Femur left neck z-score	Femur left neck z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_shaft_area	22	bone_density	Femur left shaft area	Femur left shaft area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_shaft_bmc	22	bone_density	Femur left shaft bone mineral content	Femur left shaft bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_shaft_bmd	22	bone_density	Femur left shaft bone mineral density	Femur left shaft bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_am_percent	22	bone_density	Femur left total age-matched percent	Femur left total age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_area	22	bone_density	Femur left total area	Femur left total area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_bmc	22	bone_density	Femur left total bone mineral content	Femur left total bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_bmd	22	bone_density	Femur left total bone mineral density	Femur left total bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_t_score	22	bone_density	Femur left total t-score	Femur left total t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_ya_percent	22	bone_density	Femur left total young-adult percent	Femur left total young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_total_z_score	22	bone_density	Femur left total z-score	Femur left total z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_am_percent	22	bone_density	Femur left troch age-matched percent	Femur left trochanter age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_area	22	bone_density	Femur left troch area	Femur left trochanter area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_bmc	22	bone_density	Femur left troch bone mineral content	Femur left trochanter bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_bmd	22	bone_density	Femur left troch bone mineral density	Femur left trochanter bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_t_score	22	bone_density	Femur left troch t-score	Femur left trochanter t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_ya_percent	22	bone_density	Femur left troch young-adult percent	Femur left trochanter young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_troch_z_score	22	bone_density	Femur left troch z-score	Femur left trochanter z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_am_percent	22	bone_density	Femur left upper neck age-matched percent	Femur left upper neck age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_area	22	bone_density	Femur left upper neck area	Femur left upper neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_bmc	22	bone_density	Femur left upper neck bone mineral content	Femur left upper neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_bmd	22	bone_density	Femur left upper neck bone mineral density	Femur left upper neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_t_score	22	bone_density	Femur left upper neck t-score	Femur left upper neck t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_ya_percent	22	bone_density	Femur left upper neck young-adult percent	Femur left upper neck young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_upper_neck_z_score	22	bone_density	Femur left upper neck z-score	Femur left upper neck z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_am_percent	22	bone_density	Femur left wards age-matched percent	Femur left wards age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_area	22	bone_density	Femur left wards area	Femur left wards area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_bmc	22	bone_density	Femur left wards bone mineral content	Femur left wards bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_bmd	22	bone_density	Femur left wards bone mineral density	Femur left wards bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_t_score	22	bone_density	Femur left wards t-score	Femur left wards t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_ya_percent	22	bone_density	Femur left wards young-adult percent	Femur left wards young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_left_wards_z_score	22	bone_density	Femur left wards z-score	Femur left wards z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_diff_area	22	bone_density	Femur lower neck diff area	Femur difference in lower neck area between sides	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_diff_bmc	22	bone_density	Femur lower neck diff bone mineral content	Femur difference in lower neck bone mineral co...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_diff_bmd	22	bone_density	Femur lower neck diff bone mineral density	Femur difference in lower neck bone mineral de...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_mean_area	22	bone_density	Femur lower neck mean area	Femur lower neck mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_mean_bmc	22	bone_density	Femur lower neck mean bone mineral content	Femur lower neck mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_lower_neck_mean_bmd	22	bone_density	Femur lower neck mean bone mineral density	Femur lower neck mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_diff_area	22	bone_density	Femur neck diff area	Femur difference in neck area between sides	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_diff_bmc	22	bone_density	Femur neck diff bone mineral content	Femur difference in neck bone mineral content ...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_diff_bmd	22	bone_density	Femur neck diff bone mineral density	Femur difference in neck bone mineral density ...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_am_percent	22	bone_density	Femur neck mean age-matched percent	Femur neck mean age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_area	22	bone_density	Femur neck mean area	Femur neck mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_bmc	22	bone_density	Femur neck mean bone mineral content	Femur neck mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_bmd	22	bone_density	Femur neck mean bone mineral density	Femur neck mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_t_score	22	bone_density	Femur neck mean t-score	Femur neck mean t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_ya_percent	22	bone_density	Femur neck mean young-adult percent	Femur neck mean young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_neck_mean_z_score	22	bone_density	Femur neck mean z-score	Femur neck mean z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_lower_neck_area	22	bone_density	Femur right lower neck area	Femur right lower neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_lower_neck_bmc	22	bone_density	Femur right lower neck bone mineral content	Femur right lower neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_lower_neck_bmd	22	bone_density	Femur right lower neck bone mineral density	Femur right lower neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_am_percent	22	bone_density	Femur right neck age-matched percent	Femur right neck age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_area	22	bone_density	Femur right neck area	Femur right neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_bmc	22	bone_density	Femur right neck bone mineral content	Femur right neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_bmd	22	bone_density	Femur right neck bone mineral density	Femur right neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_t_score	22	bone_density	Femur right neck t-score	Femur right neck t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_ya_percent	22	bone_density	Femur right neck young-adult percent	Femur right neck young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_neck_z_score	22	bone_density	Femur right neck z-score	Femur right neck z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_shaft_area	22	bone_density	Femur right shaft area	Femur right shaft area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_shaft_bmc	22	bone_density	Femur right shaft bone mineral content	Femur right shaft bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_shaft_bmd	22	bone_density	Femur right shaft bone mineral density	Femur right shaft bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_am_percent	22	bone_density	Femur right total age-matched percent	Femur right total age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_area	22	bone_density	Femur right total area	Femur right total area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_bmc	22	bone_density	Femur right total bone mineral content	Femur right total bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_bmd	22	bone_density	Femur right total bone mineral density	Femur right total bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_t_score	22	bone_density	Femur right total t-score	Femur right total t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_ya_percent	22	bone_density	Femur right total young-adult percent	Femur right total young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_total_z_score	22	bone_density	Femur right total z-score	Femur right total z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_am_percent	22	bone_density	Femur right troch age-matched percent	Femur right trochanter age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_area	22	bone_density	Femur right troch area	Femur right trochanter area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_bmc	22	bone_density	Femur right troch bone mineral content	Femur right trochanter bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_bmd	22	bone_density	Femur right troch bone mineral density	Femur right trochanter bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_t_score	22	bone_density	Femur right troch t-score	Femur right trochanter t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_ya_percent	22	bone_density	Femur right troch young-adult percent	Femur right trochanter young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_troch_z_score	22	bone_density	Femur right troch z-score	Femur right trochanter z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_am_percent	22	bone_density	Femur right upper neck age-matched percent	Femur right upper neck age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_area	22	bone_density	Femur right upper neck area	Femur right upper neck area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_bmc	22	bone_density	Femur right upper neck bone mineral content	Femur right upper neck bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_bmd	22	bone_density	Femur right upper neck bone mineral density	Femur right upper neck bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_t_score	22	bone_density	Femur right upper neck t-score	Femur right upper neck t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_ya_percent	22	bone_density	Femur right upper neck young-adult percent	Femur right upper neck young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_upper_neck_z_score	22	bone_density	Femur right upper neck z-score	Femur right upper neck z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_am_percent	22	bone_density	Femur right wards age-matched percent	Femur right wards triangel age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_area	22	bone_density	Femur right wards area	Femur right wards triangel area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_bmc	22	bone_density	Femur right wards bone mineral content	Femur right wards triangel bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_bmd	22	bone_density	Femur right wards bone mineral density	Femur right wards triangel bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_t_score	22	bone_density	Femur right wards t-score	Femur right wards triangel t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_ya_percent	22	bone_density	Femur right wards young-adult percent	Femur right wards triangel young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_right_wards_z_score	22	bone_density	Femur right wards z-score	Femur right wards triangel z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_diff_area	22	bone_density	Femur shaft diff area	Femur difference in shaft area between sides	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_diff_bmc	22	bone_density	Femur shaft diff bone mineral content	Femur difference in shaft bone mineral content...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_diff_bmd	22	bone_density	Femur shaft diff bone mineral density	Femur shaft diff bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_mean_area	22	bone_density	Femur shaft mean area	Femur shaft mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_mean_bmc	22	bone_density	Femur shaft mean bone mineral content	Femur shaft mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_shaft_mean_bmd	22	bone_density	Femur shaft mean bone mineral density	Femur shaft mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_diff_area	22	bone_density	Femur total diff area	Femur difference in total area between sides	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_diff_bmc	22	bone_density	Femur total diff bone mineral content	Femur difference in total bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_diff_bmd	22	bone_density	Femur total diff bone mineral density	Femur difference total bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_am_percent	22	bone_density	Femur total mean age-matched percent	Femur total mean age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_area	22	bone_density	Femur total mean area	Femur total mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_bmc	22	bone_density	Femur total mean bone mineral content	Femur total mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_bmd	22	bone_density	Femur total mean bone mineral density	Femur total mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_t_score	22	bone_density	Femur total mean t-score	Femur total mean t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_ya_percent	22	bone_density	Femur total mean young-adult percent	Femur total mean young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_total_mean_z_score	22	bone_density	Femur total mean z-score	Femur total mean z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_diff_area	22	bone_density	Femur troch diff area	Femur difference in troch area between sides	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_diff_bmc	22	bone_density	Femur troch diff bone mineral content	Femur difference in troch bone mineral content...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_diff_bmd	22	bone_density	Femur troch diff bone mineral density	Femur difference in troch bone mineral density...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_am_percent	22	bone_density	Femur troch mean age-matched percent	Femur trochanter mean age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_area	22	bone_density	Femur troch mean area	Femur trochanter mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_bmc	22	bone_density	Femur troch mean bone mineral content	Femur trochanter mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_bmd	22	bone_density	Femur troch mean bone mineral density	Femur trochanter mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_t_score	22	bone_density	Femur troch mean t-score	Femur trochanter mean t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_ya_percent	22	bone_density	Femur troch mean young-adult percent	Femur trochanter mean young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_troch_mean_z_score	22	bone_density	Femur troch mean z-score	Femur trochanter mean z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_diff_area	22	bone_density	Femur upper neck diff area	Femur upper neck diff area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_diff_bmc	22	bone_density	Femur upper neck diff bone mineral content	Femur difference in upper neck bone mineral co...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_diff_bmd	22	bone_density	Femur upper neck diff bone mineral density	Femur difference in upper neck bone mineral de...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_am_percent	22	bone_density	Femur upper neck mean age-matched percent	Femur upper neck mean age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_area	22	bone_density	Femur upper neck mean area	Femur upper neck mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_bmc	22	bone_density	Femur upper neck mean bone mineral content	Femur upper neck mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_bmd	22	bone_density	Femur upper neck mean bone mineral density	Femur upper neck mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_t_score	22	bone_density	Femur upper neck mean t-score	Femur upper neck mean t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_ya_percent	22	bone_density	Femur upper neck mean young-adult percent	Femur upper neck mean young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_upper_neck_mean_z_score	22	bone_density	Femur upper neck mean z-score	Femur upper neck mean z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_diff_area	22	bone_density	Femur wards diff area	Femur difference in wards triangel area betwee...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_diff_bmc	22	bone_density	Femur wards diff bone mineral content	Femur difference in wards triangel bone minera...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_diff_bmd	22	bone_density	Femur wards diff bone mineral density	Femur difference in wards triangel bone minera...	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_am_percent	22	bone_density	Femur wards mean age-matched percent	Femur wards triangel mean age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_area	22	bone_density	Femur wards mean area	Femur wards triangel mean area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_bmc	22	bone_density	Femur wards mean bone mineral content	Femur wards triangel mean bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_bmd	22	bone_density	Femur wards mean bone mineral density	Femur wards triangel mean bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_t_score	22	bone_density	Femur wards mean t-score	Femur wards triangel mean t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_ya_percent	22	bone_density	Femur wards mean young-adult percent	Femur wards triangel mean young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
femur_wards_mean_z_score	22	bone_density	Femur wards mean z-score	Femur wards triangel mean z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_dose	22	bone_density	Spine dose	Spine radiation dose	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	μGy	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_am_percent	22	bone_density	Spine l1 age-matched percent	Spine l1 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_area	22	bone_density	Spine l1 area	Spine l1 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_average_height	22	bone_density	Spine l1 average height	Spine l1 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_average_width	22	bone_density	Spine l1 average width	Spine l1 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_bmc	22	bone_density	Spine l1 bone mineral content	Spine l1 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_bmd	22	bone_density	Spine l1 bone mineral density	Spine l1 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_am_percent	22	bone_density	Spine l1 l2 age-matched percent	Spine l1 l2 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_area	22	bone_density	Spine l1 l2 area	Spine l1 l2 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_average_height	22	bone_density	Spine l1 l2 average height	Spine l1 l2 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_average_width	22	bone_density	Spine l1 l2 average width	Spine l1 l2 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_bmc	22	bone_density	Spine l1 l2 bone mineral content	Spine l1 l2 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_bmd	22	bone_density	Spine l1 l2 bone mineral density	Spine l1 l2 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_t_score	22	bone_density	Spine l1 l2 t-score	Spine l1 l2 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_ya_percent	22	bone_density	Spine l1 l2 young-adult percent	Spine l1 l2 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l2_z_score	22	bone_density	Spine l1 l2 z-score	Spine l1 l2 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_am_percent	22	bone_density	Spine l1 l3 age-matched percent	Spine l1 l3 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_area	22	bone_density	Spine l1 l3 area	Spine l1 l3 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_average_height	22	bone_density	Spine l1 l3 average height	Spine l1 l3 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_average_width	22	bone_density	Spine l1 l3 average width	Spine l1 l3 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_bmc	22	bone_density	Spine l1 l3 bone mineral content	Spine l1 l3 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_bmd	22	bone_density	Spine l1 l3 bone mineral density	Spine l1 l3 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_t_score	22	bone_density	Spine l1 l3 t-score	Spine l1 l3 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_ya_percent	22	bone_density	Spine l1 l3 young-adult percent	Spine l1 l3 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l3_z_score	22	bone_density	Spine l1 l3 z-score	Spine l1 l3 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_am_percent	22	bone_density	Spine l1 l4 age-matched percent	Spine l1 l4 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_area	22	bone_density	Spine l1 l4 area	Spine l1 l4 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_average_height	22	bone_density	Spine l1 l4 average height	Spine l1 l4 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_average_width	22	bone_density	Spine l1 l4 average width	Spine l1 l4 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_bmc	22	bone_density	Spine l1 l4 bone mineral content	Spine l1 l4 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_bmd	22	bone_density	Spine l1 l4 bone mineral density	Spine l1 l4 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_t_score	22	bone_density	Spine l1 l4 t-score	Spine l1 l4 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_ya_percent	22	bone_density	Spine l1 l4 young-adult percent	Spine l1 l4 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_l4_z_score	22	bone_density	Spine l1 l4 z-score	Spine l1 l4 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_t_score	22	bone_density	Spine l1 t-score	Spine l1 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_ya_percent	22	bone_density	Spine l1 young-adult percent	Spine l1 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l1_z_score	22	bone_density	Spine l1 z-score	Spine l1 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_am_percent	22	bone_density	Spine l2 age-matched percent	Spine l2 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_area	22	bone_density	Spine l2 area	Spine l2 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_average_height	22	bone_density	Spine l2 average height	Spine l2 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_average_width	22	bone_density	Spine l2 average width	Spine l2 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_bmc	22	bone_density	Spine l2 bone mineral content	Spine l2 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_bmd	22	bone_density	Spine l2 bone mineral density	Spine l2 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_am_percent	22	bone_density	Spine l2 l3 age-matched percent	Spine l2 l3 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_area	22	bone_density	Spine l2 l3 area	Spine l2 l3 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_average_height	22	bone_density	Spine l2 l3 average height	Spine l2 l3 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_average_width	22	bone_density	Spine l2 l3 average width	Spine l2 l3 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_bmc	22	bone_density	Spine l2 l3 bone mineral content	Spine l2 l3 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_bmd	22	bone_density	Spine l2 l3 bone mineral density	Spine l2 l3 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_t_score	22	bone_density	Spine l2 l3 t-score	Spine l2 l3 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_ya_percent	22	bone_density	Spine l2 l3 young-adult percent	Spine l2 l3 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l3_z_score	22	bone_density	Spine l2 l3 z-score	Spine l2 l3 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_am_percent	22	bone_density	Spine l2 l4 age-matched percent	Spine l2 l4 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_area	22	bone_density	Spine l2 l4 area	Spine l2 l4 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_average_height	22	bone_density	Spine l2 l4 average height	Spine l2 l4 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_average_width	22	bone_density	Spine l2 l4 average width	Spine l2 l4 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_bmc	22	bone_density	Spine l2 l4 bone mineral content	Spine l2 l4 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_bmd	22	bone_density	Spine l2 l4 bone mineral density	Spine l2 l4 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_t_score	22	bone_density	Spine l2 l4 t-score	Spine l2 l4 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_ya_percent	22	bone_density	Spine l2 l4 young-adult percent	Spine l2 l4 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_l4_z_score	22	bone_density	Spine l2 l4 z-score	Spine l2 l4 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_t_score	22	bone_density	Spine l2 t-score	Spine l2 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_ya_percent	22	bone_density	Spine l2 young-adult percent	Spine l2 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l2_z_score	22	bone_density	Spine l2 z-score	Spine l2 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_am_percent	22	bone_density	Spine l3 age-matched percent	Spine l3 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_area	22	bone_density	Spine l3 area	Spine l3 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_average_height	22	bone_density	Spine l3 average height	Spine l3 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_average_width	22	bone_density	Spine l3 average width	Spine l3 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_bmc	22	bone_density	Spine l3 bone mineral content	Spine l3 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_bmd	22	bone_density	Spine l3 bone mineral density	Spine l3 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_am_percent	22	bone_density	Spine l3 l4 age-matched percent	Spine l3 l4 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_area	22	bone_density	Spine l3 l4 area	Spine l3 l4 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_average_height	22	bone_density	Spine l3 l4 average height	Spine l3 l4 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_average_width	22	bone_density	Spine l3 l4 average width	Spine l3 l4 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_bmc	22	bone_density	Spine l3 l4 bone mineral content	Spine l3 l4 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_bmd	22	bone_density	Spine l3 l4 bone mineral density	Spine l3 l4 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_t_score	22	bone_density	Spine l3 l4 t-score	Spine l3 l4 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_ya_percent	22	bone_density	Spine l3 l4 young-adult percent	Spine l3 l4 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_l4_z_score	22	bone_density	Spine l3 l4 z-score	Spine l3 l4 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_t_score	22	bone_density	Spine l3 t-score	Spine l3 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_ya_percent	22	bone_density	Spine l3 young-adult percent	Spine l3 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l3_z_score	22	bone_density	Spine l3 z-score	Spine l3 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_am_percent	22	bone_density	Spine l4 age-matched percent	Spine l4 age-matched percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_area	22	bone_density	Spine l4 area	Spine l4 area	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_average_height	22	bone_density	Spine l4 average height	Spine l4 average height	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_average_width	22	bone_density	Spine l4 average width	Spine l4 average width	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	cm	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_bmc	22	bone_density	Spine l4 bone mineral content	Spine l4 bone mineral content	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_bmd	22	bone_density	Spine l4 bone mineral density	Spine l4 bone mineral density	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	gram/cm^2	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_t_score	22	bone_density	Spine l4 t-score	Spine l4 t-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_ya_percent	22	bone_density	Spine l4 young-adult percent	Spine l4 young-adult percent	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	%	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN
spine_l4_z_score	22	bone_density	Spine l4 z-score	Spine l4 z-score	bone_density/bone_density.parquet	Continuous	NaN	NaN	NaN	Accruing	NaN	NaN	Primary	Both sexes	Single	NaN	2020-06-09	NaN	float	NaN

Plot histogram and ecdf for body_arms_bmd at baseline visit

from pheno_utils.basic_plots import hist_ecdf_plots

col = "body_arms_bmd"
df = pl[[col] + ["age", "sex", "collection_date"]].loc[:,:,"00_00_visit",0,:]

# plot histogram and ecdf
hist_ecdf_plots(df.dropna(subset=[col,"sex", "age"]), col, gender_col="sex")

# stats
display(df[col].describe().to_frame().T)

	count	mean	std	min	25%	50%	75%	max
body_arms_bmd	6627.0	0.934747	0.150495	0.0	0.828062	0.929647	1.043635	1.554153