Understanding Cohort Studies

What is the primary aim of a cohort study?

• To intervene in the participants' lifestyle

• To link risk factors with diseases

• To provide immediate treatment

• To compare different treatment methods

In a cohort study, how are participants typically grouped?

• Based on their gender

• Based on their age

• Based on their income level

• Based on their exposure to a risk factor

What is a key difference between cohort studies and case-control studies?

• Cohort studies are always retrospective

• Case-control studies are based on exposure

• Case-control studies are more expensive

• Cohort studies group participants by exposure, while case-control studies group by outcome

Which of the following is a limitation of cohort studies?

• They are prone to biases over time

• They are quick to conduct

• They do not require follow-up

• They are inexpensive

Why might participants drop out of a cohort study over time?

• Due to lack of interest

• Because they are not paid

• Because the study is too short

• Due to the long duration of the study