The sources of evidence in epidemiology include: - Randomized Controlled Trials (RCTs): Considered the gold standard for determining the efficacy of interventions. - Cohort Studies: Useful for identifying risk factors and establishing temporal sequences. - Case-Control Studies: Effective for studying rare diseases or conditions. - Cross-Sectional Studies: Provide a snapshot of the health status of a population at a particular point in time. - Systematic Reviews and Meta-Analyses: Summarize and synthesize findings from multiple studies to provide high-quality evidence.
