A sample of 16,000 women was randomly assigned to take HRT (Hormone Replacement Therapy) or a placebo for 8 years. The results found a larger proportion of heart attacks among women taking HRT than placebo. What type of study is this?
A) Retrospective
B) Prospective

Question

Quizplus · Accepted Answer

This is a prospective study because it involves following a group of individuals over time to observe outcomes, such as the occurrence of heart attacks, after the intervention (HRT or placebo) has been assigned.

A Sample of 16,000 Women Was Randomly Assigned to Take