Investigator Names and Contact Information
Core study approved by WHI Steering Committee
Subsample and core analytes were specified in the original WHI RFP.
All CT participants provided a blood sample at baseline and year 1. A 6% subsample of CT participants was randomly selected to provide additional blood samples at years 3, 6, and 9. This 6% subsample was adjusted as recruitment progressed to include a six-fold oversampling of racial/ethnic minority women while retaining a 6% subsampling in each Clinical Center. It selection also included a two-fold oversampling of HT (including HT and DM overlap) women (8.6%) as compared to DM-only women (4.3%).
A total of 4,546 participants were selected to be in this 6% subsample. The final numbers of the subsample women by racial/ethnic group and CT component are shown below. Note that the totals by race/ethnicity take into account the approximate 10-14% participants who are in both the HT and DM participants.