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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Crying time (s) | 1 | 29 | Mean Difference (IV, Fixed, 95% CI) | 15.2 [11.52, 18.88] |
| 2 Grimacing time | 1 | 29 | Mean Difference (IV, Fixed, 95% CI) | 16.20 [12.35, 20.05] |
