Pharmacoepidemiology

Observational studies are

• Cohort study

• Case control study

• Cross sectional study

• Case report study

Analytical studies are

• Cohort study

• Case control study

• Cross sectional study

• Case report study

Retrospective studies

• are inexpensive

• are conducted for longer period of time

• can access to large number of subjects

• have complete information or data

Prospective studies

• are inexpensive

• are conducted for longer period of time

• can access to large number of subjects

• have complete information or data

Describe an example of a case-control study