Demographics and Study Membership
| File Name | Data as of | Population | Data collected | One row per | Rows |
|---|---|---|---|---|---|
| dem_ctos_inv.dat | 2/17/2024 | CT+OS | Baseline, Main | Participant | 161,808 |
ID - WHI Participant Common ID Col 1
CTFLAG - CT Participant Col 2 Indicates if a participant has been randomized to one or more of the Clinical Trial components (HRT, CAD, DM).
HRTFLAG - HRT Participant Col 3 Indicates if a participant has been randomized to the Hormone Replacement Therapy Trial.
DMFLAG - DM Participant Col 4 Indicates if a participant has been randomized to the Dietary Modification Trial.
CADFLAG - CAD Participant Col 5 Indicates if a participant has been randomized to the Calcium and Vitamin D Trial.
OSFLAG - OS Participant Col 6 Indicates if a participant has been enrolled into the Observational Study.
EXTFLAG - Enrolled in WHI Extension 1 Col 7 Indicates if a participant is enrolled in the WHI Extension 1
EXTDAYS - Days since randomization/enrollment to WHI Extension 1 enrollment Col 8 Days between Main Study randomization and Extension 1 enrollment. The date of the Extension 1 enrollment is the receival date of the participant 's consent to be part of the WHI Extension 1.
EXTSTARTYR - Years in WHI at start of WHI Extension 1 Col 9 The number of years in WHI at the time the WHI Extension 1 started. This may or may not not be the year the participant consented to the WHI Extension 1. In general a participant will have consented to the Extension 1 prior to the start of the Extension 1, but many also consented after the start of the Extension 1.
EXT2FLAG - Enrolled in WHI Extension 2 Col 10 Indicates if a participant is enrolled in the WHI Extension 2
EXT2DAYS - Days since randomization/enrollment to WHI Extension 2 enrollment Col 11 Days between Main Study randomization and Extension 2 enrollment. The date of the Extension 2 enrollment is the receival date of the participant 's Extension 2 consent form.
EXT2MRC - Extension 2 MRC Participant Col 12 Indicates whether the participant is in Extension 2 and is in the Medical Record Cohort.
EXT2SRC - Extension 2 SRC Participant Col 13 Indicates whether the participant is in Extension 2 and is in the Self Report Cohort.
DBGAPCONSENT - Current dbGaP consent status Col 14 Usage Notes: For more information, please see the “Limitations on Use in Public Datasets” located at the bottom of this webpage. https://www.whi.org/md/gwas
AGE - Age at screening Col 15 Age at screening. Computed from Form 2 birth date. Usage Notes: Age at screening may differ from the age stratum to which a participant was randomized, due to participants requesting a correction to their Form 2 birth date after randomization. Once a participant was randomized to a specific age stratum, they remained in that stratum despite corrections to their birth date. Therefore, the "Age stratum at randomization or enrollment" variable may differ from the age reflected in this variable.
AGER - Age group at screening Col 16 Computed from Form 2 birth date. Age categorized into three 10-year intervals (<50-59, 60-69 and 70-79+). Usage Notes: Categorization of this variable may differ from the "Age stratum at randomization or enrollment" variable due to participants requesting a correction to their Form 2 birth date after randomization/enrollment.
AGESTRAT - Age stratum at randomization or enrollment Col 17 Usage Notes: Based on the birth date reported by the participant at the time of randomization or enrollment. Categorization of the Age at Screening variable may differ due to participants requesting a correction to their Form 2 birth date after randomization.
REGION - U. S. Region at randomization or enrollment Col 18 Location of participant’s randomization or enrollment clinic. Four categories based on US Census defined regions.
LANG - Current preferred language Col 19
EDUC - Education at screening Col 20
INCOME - Family Income at screening Col 21
HRTARM - HRT Arm Col 22 Hormone Replacement Therapy study arm to which the participant was randomized
DMARM - DM Arm Col 23 Dietary Modification study arm to which the participant was randomized
CADARM - CaD Arm Col 24 Calcium and vitamin D study arm to which the participant was randomized
CADDAYS - Days since CT randomization to CaD randomization Col 25
BMDFLAG - Rand to BMD Col 26 Indicates if the participant was randomized or enrolled at a bone density clinic and was not randomized or enrolled as a part of enhanced recruitment for that clinic.
SHAREPPT - SHARe Analytic Sample Flag Col 27 Indicates if a participant is part of the WHI SHARe (SNP Health Association Resource)
LATREGION - Latitude (degrees N) of CC at CT randomization/OS enrollment Col 28 Usage Notes: Region of residence at the time of randomization or enrollment, based on the latitude of the responsible clinical center.
WATTSCAT - Watts ((J/s) per m2) of CC at CT randomization/OS enrollment Col 29 Usage Notes: The WATT is a unit of solar irradiance and measures the daily UVB flux reaching the earth, within the wavelength range necessary for vitamin D synthesis. The information is in: Lubin D, Jensen EH, Gies HP. Global surface ultraviolet radiation climatology from TOMS and ERBE data. Journal of Geophysical Research 1998;103 (D20):26061-26091. Categories are based on the WATTs of the clinical center at the time of randomization or enrollment.
LANGLEYSCAT - Langleys (g-cal per cm2) of CC at CT randomization/OS enrollment Col 30 Usage Notes: The Langley is a unit of solar irradiance and relates to the amount that reaches a given area of the earth’s surface. The information is from national weather data on total solar irradiance in the United States and is adapted from Garland and Garland (Do sunlight and vitamin D reduce the likelihood of colon cancer? Int J Epidemiol 1980;9:227-31.) Categories are based on the Langleys of the clinical center at the time of randomization or enrollment.
LATREGIONCAD - Latitude (degrees N) of CC at CaD randomization Col 31 Usage Notes: Region of residence at the time of CaD trial randomization, based on the latitude of the responsible clinical center.
WATTSCATCAD - Watts ((J/s) per m2) of CC at CaD randomization Col 32 Usage Notes: The WATT is a unit of solar irradiance and measures the daily UVB flux reaching the earth, within the wavelength range necessary for vitamin D synthesis. The information is in: Lubin D, Jensen EH, Gies HP. Global surface ultraviolet radiation climatology from TOMS and ERBE data. Journal of Geophysical Research 1998;103 (D20):26061-26091. Categories are based on the WATTs of the clinical center at the time of CaD trial randomization.
LANGLEYSCATCAD - Langleys (g-cal per cm2) of CC at CaD randomization Col 33 Usage Notes: The Langley is a unit of solar irradiance and relates to the amount that reaches a given area of the earth’s surface. The information is from national weather data on total solar irradiance in the United States and is adapted from Garland and Garland (Do sunlight and vitamin D reduce the likelihood of colon cancer? Int J Epidemiol 1980;9:227-31.) Categories are based on the Langleys of the clinical center at the time of CaD trial randomization.
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