This document can be used to prepare or evaluate feasibility of ancillary study proposals and paper proposals, but is NOT intended for publication.

BMD Whole Body Scan (CT+OS)

File Name	Data as of	Population	Data collected	One row per	Rows
bmd_wbody_ctos_inv.dat	2/17/2024	CT+OS	Baseline, Main	Bone Density Scan	39,788

BMD summary: Bone Density measurements were collected on a subsample of 11,020 participants at three clinical sites (see the subsample definitions on the previous WHI Data on this site). See the 2005 progress report for a summary of bone mineral density analysis, including percent change from baseline; see page 2-6 for HT table, page 3-13 for DM, page 4-3 for CaD, and page 5-2 for OS. For the standardized procedures for performing the measurements, see Vol. 6 – DXA Quality Assurance of the WHI (1993-2005) manuals under the Documentation tab.

ID - WHI Participant Common ID

Col 1

N	Missing
39,788	0

WBDAYS - Whole body scan days from randomization/enrollment

Col 2

N	Missing	Min	Max	Mean	StdDev
39,788	0	-1,399	4,059	1,256.662	1,167.036

WBVTYP - Whole body scan visit type

Col 3

Value	Description	N	%
1	Screening	11,393	28.6
2	Semi-Annual visit	819	2.1
3	Annual visit	27,355	68.8
4	Non-Routine visit	221	0.6

WBVY - Whole body visit year

Col 4

Visit year for which this BMD scan was collected.

N	Missing	Min	Max	Mean	StdDev
39,567	221	0	11	3.415	3.166

WBVCLO - Closest to visit within visit type and year

Col 5

For forms entered with the same visit type and year, indicates the one closest to that visit's target date. Valid for forms entered with an annual or semi-annual visit type.

Usage Notes:

See data preparation document.

Value	Description	N	%
0	No	261	0.7
1	Yes	39,527	99.3

WBEXPC - Expected for visit

Col 6

Was data expected to be collected at this visit?

Usage Notes:

This includes forms from the subsample of OS participants at year 6 that were enrolled in the three clinical centers participating in the WHI Osteoporosis sub study, as height and weight were collected on OS participants at year 6 by design; see table 16.1; on page 16-18b of volume 2.

Value	Description	N	%
0	No	680	1.7
1	Yes	39,108	98.3

WBLFLEGFAT - Fat mass of the left leg (grams)

Col 7

N	Missing	Min	Max	Mean	StdDev
39,444	344	215	20,062	5,957.254	2,124.235

WBLFLEGFFM - Fat free mass of the left leg (grams)

Col 8

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,317	15,072	6,121.843	1,178.141

WBLFLEGLEN - Lean mass of the left leg (grams)

Col 9

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,305	14,398	5,731.503	1,129.314

WBLFLEGAREA - Area of left leg region (cm squared)

Col 10

N	Missing	Min	Max	Mean	StdDev
39,788	0	22	568	368.106	45.993

WBLFLEGBMC - BMC of left leg region (grams)

Col 11

N	Missing	Min	Max	Mean	StdDev
39,788	0	12	1,406	390.347	88.043

WBLFLEGBMD - BMD of left leg region (g/cm squared)

Col 12

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.525	4.542	1.053	0.163

WBRTLEGFAT - Fat mass of the right leg (grams)

Col 13

N	Missing	Min	Max	Mean	StdDev
39,444	344	237	20,208	6,097.837	2,157.147

WBRTLEGFFM - Fat free mass of the right leg (grams)

Col 14

N	Missing	Min	Max	Mean	StdDev
39,444	344	282	15,868	6,165.891	1,176.507

WBRTLEGLEN - Lean mass of the right leg (grams)

Col 15

N	Missing	Min	Max	Mean	StdDev
39,439	349	1,349	15,371	5,773.852	1,126.767

WBRTLEGAREA - Area of right leg region (cm squared)

Col 16

N	Missing	Min	Max	Mean	StdDev
39,783	5	71	621	369.184	46.449

WBRTLEGBMC - BMC of right leg region (grams)

Col 17

N	Missing	Min	Max	Mean	StdDev
39,783	5	47	1,059	392.891	90.113

WBRTLEGBMD - BMD of right leg region (g/cm squared)

Col 18

N	Missing	Min	Max	Mean	StdDev
39,783	5	0.567	2.74	1.057	0.167

WBTRUNKFAT - Fat mass of the trunk (grams)

Col 19

N	Missing	Min	Max	Mean	StdDev
39,444	344	359	50,162	15,017.988	6,158.249

WBTRUNKFFM - Fat free mass of the trunk (grams)

Col 20

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,599	35,515	20,426.567	2,794.591

WBTRUNKLEN - Lean mass of the trunk (grams)

Col 21

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,073	34,729	19,911.05	2,727.715

WBTRUNKBMC - Trunk BMC

Col 22

N	Missing	Min	Max	Mean	StdDev
39,788	0	198	1,286	515.468	111.611

WBFAT - Whole body fat mass (grams)

Col 23

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,244	86,945	32,369.769	11,498.914

WBFATCOR - Whole body fat mass (corrected) (grams)

Col 24

Usage Notes:

Corrected fat mass value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,444	344	1,244	86,945	32,776.478	11,540.207

WBFFM - Whole body fat free mass (grams)

Col 25

N	Missing	Min	Max	Mean	StdDev
39,444	344	10,397	75,751	40,141.694	5,824.466

WBFFMCOR - Whole body fat free mass (corrected) (grams)

Col 26

Usage Notes:

Corrected fat free mass value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,444	344	10,397	73,340	39,738.139	5,648.631

WBLEAN - Whole body lean mass (grams)

Col 27

N	Missing	Min	Max	Mean	StdDev
39,444	344	8,248	72,886	38,079.143	5,587.287

WBLEANCOR - Whole body lean mass (corrected) (grams)

Col 28

Usage Notes:

Corrected lean mass value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,444	344	8,248	70,363	37,678.622	5,404.795

WBMASS - Whole body mass (grams)

Col 29

N	Missing	Min	Max	Mean	StdDev
39,444	344	12,725	137,306	72,511.462	15,553.014

WBMASSCOR - Whole body mass (corrected) (grams)

Col 30

Usage Notes:

Corrected mass value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,444	344	12,725	137,306	72,514.616	15,577.561

WBPCT - Whole body percent fat

Col 31

N	Missing	Min	Max	Mean	StdDev
39,444	344	6.8	66.4	43.504	7.411

WBPCTCOR - Whole body percent fat (corrected)

Col 32

Usage Notes:

Corrected pct fat value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,444	344	6.8	66.4	44.058	7.302

WBAREA - Whole body area (cm squared)

Col 33

N	Missing	Min	Max	Mean	StdDev
39,788	0	907.75	2,832.1	1,996.02	205.652

WBAREACOR - Whole body area (corrected) (cm squared)

Col 34

Usage Notes:

Corrected area value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,788	0	907.75	2,845.103	1,999.365	208.69

WBBMC - Whole body BMC (grams)

Col 35

N	Missing	Min	Max	Mean	StdDev
39,788	0	778.36	3,970.64	2,063.514	379.419

WBMCCOR - Whole body BMC (corrected) (grams)

Col 36

Usage Notes:

Corrected BMC value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,788	0	778.36	3,970.64	2,060.543	381.125

WBBMD - Whole body BMD (grams/cm squared)

Col 37

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.665	1.831	1.028	0.116

WBBMDCOR - Whole body BMD (corrected) (g/cm sq)

Col 38

Usage Notes:

Corrected BMD value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.665	1.744	1.025	0.112

WBTSCOR - Whole Body BMD T-score

Col 39

Whole Body BMD T-score

Usage Notes:

The T-score represents the number of standard deviations the participant's BMD is above or below the mean for a healthy 30 year old woman of the same race/ethnicity. Based on WBBMDCOR "Whole body BMD (corrected)".

N	Missing	Min	Max	Mean	StdDev
39,788	0	-4.428	6.505	-0.783	1.138

WBHEADFAT - Fat mass of the head (grams)

Col 40

N	Missing	Min	Max	Mean	StdDev
39,444	344	150	2,014	837.244	133.453

WBHEADFFM - Fat free mass of the head (grams)

Col 41

N	Missing	Min	Max	Mean	StdDev
39,444	344	483	6,228	3,647.041	397.949

WBHEADLEAN - Lean mass of the head (grams)

Col 42

N	Missing	Min	Max	Mean	StdDev
39,441	347	2,116	5,749	3,159.529	352.538

WBHEADAREA - Area of the head region (cm squared)

Col 43

N	Missing	Min	Max	Mean	StdDev
39,785	3	144	337	232.772	16.416

WBHEADBMC - BMC of head region (grams)

Col 44

N	Missing	Min	Max	Mean	StdDev
39,785	3	193	1,179	488.519	96.154

WBHEADBMD - BMD of head region (g/cm squared)

Col 45

N	Missing	Min	Max	Mean	StdDev
39,785	3	0.926	4.517	2.093	0.349

WBLFARMFAT - Fat mass of the left arm (grams)

Col 46

N	Missing	Min	Max	Mean	StdDev
39,443	345	56	11,609	2,221.656	970.976

WBLFARMFFM - Fat free mass of the left arm (grams)

Col 47

N	Missing	Min	Max	Mean	StdDev
39,444	344	501	6,184	1,788.202	419.382

WBLFARMLEN - Lean mass of the left arm (grams)

Col 48

N	Missing	Min	Max	Mean	StdDev
39,444	344	441	5,984	1,654.501	399.043

WBLFARMAREA - Area of left arm region (cm squared)

Col 49

N	Missing	Min	Max	Mean	StdDev
39,788	0	45	421	196.923	33.515

WBLFARMBMC - BMC of left arm region (grams)

Col 50

N	Missing	Min	Max	Mean	StdDev
39,788	0	19	495	133.68	33.354

WBLFARMBMD - BMD of left arm region (g/cm squared)

Col 51

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.351	2.691	0.673	0.086

WBRTARMFAT - Fat mass of the right arm (grams)

Col 52

N	Missing	Min	Max	Mean	StdDev
39,444	344	33	10,821	2,237.843	1,013.871

WBRTARMFFM - Fat free mass of the right arm (grams)

Col 53

N	Missing	Min	Max	Mean	StdDev
39,444	344	690	5,702	1,992.159	436.563

WBRTARMLEN - Lean mass of the right arm (grams)

Col 54

N	Missing	Min	Max	Mean	StdDev
39,444	344	526	5,535	1,849.68	415.584

WBRTARMAREA - Area of right arm region (cm squared)

Col 55

N	Missing	Min	Max	Mean	StdDev
39,788	0	53	562	202.973	35.138

WBRTARMBMC - BMC of right arm region (grams)

Col 56

N	Missing	Min	Max	Mean	StdDev
39,788	0	29	531	142.699	34.984

WBRTARMBMD - BMD of right arm region (g/cm squared)

Col 57

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.399	1.923	0.697	0.083

WBLFRIBAREA - Area of left rib region (cm squared)

Col 58

N	Missing	Min	Max	Mean	StdDev
39,787	1	28	220	109.537	21.349

WBLFRIBBMC - BMC of left rib region (grams)

Col 59

N	Missing	Min	Max	Mean	StdDev
39,787	1	10	261	61.854	18.297

WBLFRIBBMD - BMD of left rib region (g/cm squared)

Col 60

N	Missing	Min	Max	Mean	StdDev
39,787	1	0.327	2.569	0.559	0.094

WBRTRIBAREA - Area of right rib region (cm squared)

Col 61

N	Missing	Min	Max	Mean	StdDev
39,787	1	25	261	128.176	26.804

WBRTRIBBMC - BMC of right rib region (grams)

Col 62

N	Missing	Min	Max	Mean	StdDev
39,787	1	12	266	74.61	20.991

WBRTRIBBMD - BMD of right rib region (g/cm squared)

Col 63

N	Missing	Min	Max	Mean	StdDev
39,787	1	0.325	1.945	0.578	0.082

WBTHRSPAREA - Area of thoracic spine region (cm sq)

Col 64

N	Missing	Min	Max	Mean	StdDev
39,788	0	5	253	153.859	23.09

WBTHRSPBMC - BMC of thoracic spine region (grams)

Col 65

N	Missing	Min	Max	Mean	StdDev
39,788	0	3	391	127.056	27.366

WBTHRSPBMD - BMD of thoracic spine region (g/cm sq)

Col 66

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.458	2.123	0.827	0.136

WBPELVAREA - Area of pelvis region (cm squared)

Col 67

N	Missing	Min	Max	Mean	StdDev
39,788	0	83	377	182.848	30.778

WBPELVBMC - BMC of pelvis region (grams)

Col 68

N	Missing	Min	Max	Mean	StdDev
39,788	0	46	845	199.999	54.756

WBPELVBMD - BMD of pelvis region (g/cm squared)

Col 69

N	Missing	Min	Max	Mean	StdDev
39,788	0	0.54	3.334	1.082	0.171

WBQDR - QDR serial number of whole body scanner

Col 70

N	Missing	Min	Max	Mean	StdDev
39,788	0	2,162	49,454	8,913.45	15,960.329