Which type of study begins with a group of people who already have a disease and then looks into factors that are associated with that disease?

Question

Quizplus · Accepted Answer

This type of study is known as a retrospective study, as it looks back at the medical histories of a group of people who already have a disease and examines potential risk factors or causes. Prospective studies, on the other hand, begin with a group of people who do not have a disease and watch them over time to see if any risk factors lead to the development of that disease. Experimental studies involve manipulating variables to see if they have an effect, and placebo studies involve giving some participants a fake treatment to see if the real treatment has a significant effect.

Which Type of Study Begins with a Group of People