19. Epidemiological studies: parameters, design
- Epidemiological studies can be classified according to
- What the aim is
- Descriptive = describe patterns of disease occurrence in relation to variables
- Analytical = test specific hypotheses
- Ecological studies
- Cross-sectional studies
- Case control studies
- Cohort studies
- Clinical trials
- The time period evaluated
- Retrospective = back in time
- Concurrent = current point in time
- Prospective = forward in time
- Whether interventions were performed
- Observational = no interventions were performed, only observation
- Case reports
- Case series
- Case control studies
- Cohort studies
- Ecological studies
- Cross-sectional studies
- Experimental/interventional = interventions or experiments were performed
- Clinical trial
- Field trial