What is the main difference between cohort studies and case-control studies? A.

Question

What is the main difference between cohort studies and case-control studies? A. Cohort studies define subjects according to exposure level and follow them for disease occurrence; in case-control studies, investigators assign participants to their exposure groups B. Case-control studies define cases and controls and compare their exposure histories; in cohort studies, we collect exposure and outcome data at the same time C. In case-control studies, cases and controls are followed up over time to examine exposure history; in cohort studies, rates of disease by aggregate characteristics of a population are examined D. Cohort studies define subjects according to exposure level and follow them for disease occurrence; case-control studies define cases and controls and compare their exposure histories

Explanation / Answer

D. Cohort studies define subjects according to exposure level and follow them for disease occurrence; case-control studies define cases and controls and compare their exposure histories

The cohort study design identifies people exposed to a particular factor and a comparison group that was not exposed to that factor and measures and compares the incidence of disease in the two groups.

The case control design identifies a group of individuals who had developed the disease (the cases) and a comparison of individuals who did not have the disease of interest. The cases and controls are then compared with respect to the frequency of one or more past exposures.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.