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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Overall behaviour (ordinal scale, Houpt or similar) | 2 | Mean Difference (IV, Random, 95% CI) | Totals not selected | |
| 1.1 Nitrous oxide vs placebo | 1 | Mean Difference (IV, Random, 95% CI) | 0.0 [0.0, 0.0] | |
| 1.2 Nitrous oxide vs midazolam | 1 | Mean Difference (IV, Random, 95% CI) | 0.0 [0.0, 0.0] |
