Cohort and Case Control Studies

Greg Martin explains the differences between case control and cohort studies in epidemiology. Case control studies are retrospective, cost-effective, and suitable for rare conditions, but provide weaker evidence. Cohort studies are prospective, expensive, and provide stronger evidence by examining rare exposures over time. The video concludes with a preview of the next topic: randomized controlled trials.

Why is evidence from case control studies considered weaker than that from cohort studies?

What are the strengths of cohort studies compared to case control studies?