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Stage III estimated effect sizes of prenatal alcohol exposure on IQ at age 7
| Method | Global effect size | SE | |
|---|---|---|---|
| Hierarchical meta-analytic approach | −3.2 | 0.8 | 1.0 (2.3) |
| One-stage (full multivariate approach) | −3.1 | 0.8 | 0.9 (2.3) |
| Conventional meta-analysis (ignoring the correlation) | −3.5 | 0.6 | 4.7 (2.7) |
