Comparison 1. Negative pressure wound therapy (NPWT) compared with dressings in postoperative wounds.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Proportion of wounds healed	1	162	Risk Ratio (M‐H, Fixed, 95% CI)	1.44 [1.03, 2.01]
2 Time to healing	1	162	Hazard Ratio (Fixed, 95% CI)	1.91 [1.21, 2.99]
3 Amputations	2	292	Risk Ratio (M‐H, Fixed, 95% CI)	0.38 [0.14, 1.02]
4 Number of wounds closed or covered with surgery	1	130	Risk Ratio (M‐H, Fixed, 95% CI)	1.02 [0.95, 1.09]
5 Adverse events	1	162	Risk Ratio (M‐H, Fixed, 95% CI)	0.96 [0.72, 1.28]