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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 13.1 Case‐control | 1 | Odds Ratio (IV, Fixed, 95% CI) | Subtotals only | |
| 13.1.1 MMR vaccine | 1 | Odds Ratio (IV, Fixed, 95% CI) | 3.40 [1.18, 9.81] |
