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

WHI Extension Membership

File NameData as ofPopulationData collectedOne row perRows
ext_ctos_inv.dat9/30/2015CT+OSExt1, Ext2Participant161,808
ID - WHI Participant Common ID
Col 1
NMissing
161,8080
EXTFLAG - Enrolled in WHI Extension 1
Col 2
Indicates if a participant is enrolled in the WHI Extension 1
ValueDescriptionN%
0No46,40128.7
1Yes115,40771.3
EXTDAYS - Days since randomization/enrollment to WHI Extension 1 enrollment
Col 3
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.
NMissingMinMaxMeanStdDev
115,40746,4012,1854,7523,056.095405.01
EXTSTARTYR - Years in WHI at start of WHI Extension 1
Col 4
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.
NMissingMinMaxMeanStdDev
115,40746,4017129.2881.182
EXT2FLAG - Enrolled in WHI Extension 2
Col 5
Indicates if a participant is enrolled in the WHI Extension 2
ValueDescriptionN%
0No68,24142.2
1Yes93,56757.8
EXT2DAYS - Days since randomization/enrollment to WHI Extension 2 enrollment
Col 6
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.
NMissingMinMaxMeanStdDev
93,56768,2414,1706,7075,031.122404.77
EXT2MRC - Extension 2 MRC Participant
Col 7
Indicates whether the participant is in Extension 2 and is in the Medical Record Cohort.
ValueDescriptionN%
0No139,49286.2
1Yes22,31613.8
EXT2SRC - Extension 2 SRC Participant
Col 8
Indicates whether the participant is in Extension 2 and is in the Self Report Cohort.
ValueDescriptionN%
0No90,55756
1Yes71,25144