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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 9.1 Presence or absence of gagging | 1 | 80 | Odds Ratio (IV, Random, 95% CI) | 86.33 [29.41, 253.45] |
| 9.2 Reduction in gagging | 1 | 50 | Mean Difference (IV, Fixed, 95% CI) | 1.80 [1.53, 2.07] |
