Comparison 7. Subgroup analyses by wound catheter location.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Pain at rest: day 1 (10‐point numerical rating scale or equivalent)	5	511	Mean Difference (IV, Random, 95% CI)	‐0.59 [‐1.12, ‐0.07]
1.1 Subcutaneous (suprafascial)	2	380	Mean Difference (IV, Random, 95% CI)	‐0.48 [‐0.91, ‐0.04]
1.2 Musculofascial	1	55	Mean Difference (IV, Random, 95% CI)	‐0.60 [‐1.69, 0.49]
1.3 Preperitoneal	2	76	Mean Difference (IV, Random, 95% CI)	‐0.87 [‐2.63, 0.89]
2 Pain on movement: day 1 (10‐point numerical rating scale or equivalent)	3	407	Mean Difference (IV, Random, 95% CI)	‐1.13 [‐2.26, ‐0.01]
2.1 Subcutaneous (suprafascial)	1	310	Mean Difference (IV, Random, 95% CI)	‐0.80 [‐1.27, ‐0.33]
2.2 Musculofascial	1	55	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐1.44, 1.04]
2.3 Preperitoneal	1	42	Mean Difference (IV, Random, 95% CI)	‐2.5 [‐3.68, ‐1.32]
3 Opioid consumption via patient‐controlled analgesia: day 1 (mg morphine equivalent)	6	528	Mean Difference (IV, Random, 95% CI)	‐11.98 [‐19.80, ‐4.17]
3.1 Subcutaneous (suprafascial)	2	380	Mean Difference (IV, Random, 95% CI)	‐20.37 [‐61.12, 20.39]
3.2 Musculofascial	1	48	Mean Difference (IV, Random, 95% CI)	‐14.10 [‐32.55, 4.35]
3.3 Preperitoneal	3	100	Mean Difference (IV, Random, 95% CI)	‐14.13 [‐19.92, ‐8.34]