BMD Hip Scan (CT+OS)
| File Name | Data as of | Population | Data collected | One row per | Rows |
|---|---|---|---|---|---|
| bmd_hip_ctos_inv.dat | 2/15/2025 | CT+OS | Baseline, Main | Bone Density Scan | 39,916 |
ID - WHI Participant Common ID Col 1
HIPDAYS - Hip scan days from randomization/enrollment Col 2
HIPVTYP - Hip scan visit type Col 3
HIPVY - Hip scan visit year Col 4 Visit year for which this BMD scan was collected.
HIPVCLO - 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 visit type. Usage Notes: See data preparation document.
HIPEXPC - Expected for visit Col 6 The BMD scan was expected for this visit. In the CT, BMD was expected for a subsample of participants at Baseline, at Annual Visits 1, 3, 6 and 9, and at Close-Out. In the OS, for a subsample of participants at Baseline and at Annual Visits 3, 6 and 9. 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.
HIPSDSCN - Side of the Hip Scan Col 7
HIPAREA - Area of the Total Hip (cm squared) Col 8
HIPBMC - BMC of the Total Hip (grams) Col 9
HIPBMD - BMD of the Total Hip (g/cm squared) Col 10
HIPBMDCOR - BMD of the Total Hip (corrected) (g/cm sq) Col 11 Usage Notes: Corrected BMD value is based on recommendations from the UCSF quality assurance report. For details see the Data Preparation document.
HIPTSCOR - Total Hip BMD T-score Col 12 Total Hip 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 HIPBMDCOR "BMD of the Total Hip (corrected)".
HIPNKAREA - Area of the Hip Neck (cm squared) Col 13
HIPNKBMC - BMC of the Hip Neck (grams) Col 14
HIPNKBMD - BMD of the Hip Neck (g/cm squared) Col 15
HIPNKTSCOR - Hip Femoral Neck BMD T-score Col 16 Hip Femoral Neck 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 HIPNKBMD "BMD of the Hip Neck".
HIPTRAREA - Area of the Hip Trochanter (cm squared) Col 17
HIPTRBMC - BMC of the Hip Trochanter (grams) Col 18
HIPTRBMD - BMD of the Hip Trochanter (g/cm squared) Col 19
HIPINAREA - Area of the Hip Intertrochanter (cm sq) Col 20
HIPINBMC - BMC of the Hip Intertrochanter (grams) Col 21
HIPINBMD - BMD of the Hip Intertrochanter (g/cm sq) Col 22
HIPWDAREA - Area of the Hip Wards Triangle (cm sq) Col 23
HIPWDBMC - BMC of the Hip Wards Triangle (grams) Col 24
HIPWDBMD - BMD of the Hip Wards Triangle (g/cm sq) Col 25
HIPQDR - QDR serial number of hip scanner Col 26
|
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). The BMDFLAG variable in the Demographics and Study Membership file identifies these original 11,020 BMD cohort participants. * 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.