This is a password protected decision tree
Do you want to compare exposures or interventions?
- Case series or Descriptive findings.
Are you assigning the interventions/exposures?
Are you going to randomise?
- Quasi-experimental Study.
What is the unit of randomisation?
Communities or Group. Individual.
- Randomized Controlled Trial.
- Cluster Randomized Trial.
Are you comparing more than one group?
No. Two or More Groups.
- Before-After or Time Interrupted Study.
Whether exposure and outcome is measured at the same time?
- Cross-sectional study.
Whether groups were assiged based on outcome?
- Case-control study.
- Cohort Study.