Meta-Analysis Skill

Purpose

Quantitatively synthesize results across multiple studies.

Meta-Analysis Steps

1. Extract Effect Sizes

• Convert to common metric (d, OR, RR)
• Calculate standard errors

2. Choose Model

• Fixed-effect: Assumes single true effect
• Random-effects: Allows heterogeneity

3. Pool Results

• Weight studies (inverse variance)
• Calculate summary effect
• 95% confidence interval