As an Estrogen-Alone participant, why did I need to fill out a Medical History Update before being told if I was in the active hormone or placebo group?
We wanted to make sure that we have information about any changes in your health since the last time you filled out the form. When we do more detailed analyses, we want to have as much health information as possible covering the period up until all Estrogen-Alone study pills were stopped. We also needed to make sure that the updated information was collected in the same way as it always had been. We did not give out study group information before you completed the form for the same reason that neither you nor the WHI staff knew your study group when you were first randomized. Avoiding any possible influence—by researchers or participants—on the data we collect is important to make sure that the study is done scientifically and that the study results can be trusted. Even if you stopped your Estrogen-Alone study pills before March 1, 2004, your health update is important because we analyze all of the data from all participants who joined the study. This is why we told you at the beginnin
Related Questions
- How could bone density be significantly higher in the active CaD group than in the placebo group when there was no difference in the rate of hip fractures?
- As an Estrogen-Alone participant, why did I need to fill out a Medical History Update before being told if I was in the active hormone or placebo group?
- If study participant is screened, up to how many days the medical history, physical examination (lab reports-ray reports, etc,) can be considered as valid?
