Cohen’s d vs Hedges’ g vs Odds Ratio: How to Convert Between Them | Meta-Analysis Tutorial

Studies in your meta-analysis report different statistics: one gives means and SDs, another a t-value, another an odds ratio, and another just a p-value. How do you combine them in one forest plot? In this video, I walk you through effect size conversion step by step, using dental research examples. You’ll learn: ✅ What effect sizes are and the three main families ✅ When conversion is required, and when you should NOT convert ✅ Formulas for Cohen’s d, Hedges’ g, r, Fisher’s z and log odds ratios ✅ Converting from t, F, exact p-values and 2×2 tables ✅ Handling paired, crossover and split-mouth designs ✅ Recovering missing SDs from SEs, CIs and medians ✅ Doing it all in JASP, free and without coding ✅ What reviewers expect in your methods section 📂 FREE RESOURCES Excel conversion calculator + 5 JASP-ready datasets: https://drive.google.com/drive/folders/1Ry... 📚 KEY REFERENCES Borenstein et al. (2009) Introduction to Meta-Analysis Cochrane Handbook, Chapters 6 & 10 Chinn (2000) Stat Med 19:3127–31 👩‍⚕️ I’m Dr Priyanka Porwal, a Dental Public Health Specialist with 15+ years in evidence synthesis. Questions about your own review? Drop them in the comments! #MetaAnalysis #EffectSize #JASP #SystematicReview #DentalResearch