Post-exam PHA491

The optimum dose for the therapy is determined in which phase of the clinical trial?

• Phase 3

• Phase 2

• Phase 1

• Phase 4

Cohort study is an observational study ?

• True

• False

In case-control study, the cases are:

• Individual with the exposure of interest

• Individual without the disease

• Individual with the disease

• Individual from the general population

What is the main difference between a prospective cohort study and a case-control study?

• A prospective cohort study is an observational study, while a case-control study is an experimental study.

• A prospective cohort study measure outcome before exposure, while a case-control study measure exposure before outcome.

• A prospective cohort study measure exposure before outcome , while a case-control study measure outcome before exposure.

• A prospective cohort study is longitudinal study, while a case-control study is a cross-sectional study.

In a cross-over type of study design, participants:

• Are divided into more than two groups

• Stay in the same group throughout the study

• Are never exposed to a placebo

• Experience both active treatment and placebo at different times