Comparison 1. Analgesic use.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Recorded total analgesic use (mg morphine equivalent)	7	460	Mean Difference (IV, Fixed, 95% CI)	‐16.86 [‐20.32, ‐13.39]
2 Analgesic use (mg morphine equivalent) for total hospital stay	2	157	Mean Difference (IV, Fixed, 95% CI)	‐6.29 [‐12.57, ‐0.01]
3 VAS scores on the first/second post‐operative day	4	337	Mean Difference (IV, Fixed, 95% CI)	‐0.03 [‐0.18, 0.12]