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| Operational outcome | MD (95% CI) | I2 | P value for heterogeneity | P value overall |
|---|---|---|---|---|
| Operation duration (min) | 6.14 (–0.91, 13.19) | 87 | <0.00001 | 0.09 |
| Blood loss (mL) | –3.22 (–14.03, 7.60) | 88 | <0.00001 | 0.56 |
| Length of stay (days) | –0.05 (–0.17, 0.07) | 47 | 0.11 | 0.45 |
MD, mean difference; CI, confidence interval.
