Question

differences of prospective and retrospective ​

Answer 1

Answer:

In prospective studies, individuals are followed over time and data about them is collected as their characteristics or circumstances change. Birth cohort studies are a good example of prospective studies.

Explanation:

In retrospective studies, individuals are sampled and information is collected about their past. This might be through interviews in which participants are asked to recall important events, or by identifying relevant administrative data to fill in information on past events and circumstances. In the case of historical cohort studies, people are linked to existing historical information.