Best study is ?
Ans. is 'c' i.e., Meta-analysis Here are the different epidemiological studies with decreasing order of accuracy to test the association between risk factor and disease : ? Systematic review and meta-analysis - Overall most reliable Randomized controlled trials (controlled clinical trails) - Most reliable individual study. Retrospective (Non-concurrent/historic) Coho study. Prospective (concurrent) Coho study. Case control study Cross-sectional study Ecological study
Case-control study
Coho study
Meta-analysis
RCT