Question

A cohort design that follows participants over a period of time until disease develops is called a _____ study.

Group of answer choices

retrospective cohort

No answer text provided.

No answer text provided.

prospective cohort

A study in which a researcher gathers information about workers in a factory and determines who was exposed and non-exposed to a specific carcinogenic agent, and then determines who in this population has now died from cancer would be an example of a_____.

Group of answer choices

prospective cohort study

No answer text provided.

retrospective cohort study

No answer text provided.

The investigators of the Framingham study sought a sample size of how many people?

Group of answer choices

740

30,000

5,000

6,000

Answer 1

Prospective cohort study starts in present from normal individuals. Some are exposed to disease-causing agent and some are not exposed. Follow-up of the participants is done to get the outcome of the exposure (disease developed or not). So this study goes from present to future.

Retrospective goes from present to past. Study has diseased participants. Study is conducted to look back the causes of disease. Who are exposed participants and who are non-exposed.

1. A cohort design that follows participants over a period of time until disease develops is called prospective study.

2. It is an example of retrospective study because the disease outcome (cancer patients has already died due to carcinogen) is already present.

3. Framingham study has a sample size of approx. 5000 people. This study is now studying third generation of participants. It studies role of cigarette smoking in heart disease.