Table 2.

Subgroup analysis of time to re‐epithelialization

	Time to re‐epithelialization (days)*
Time to presentation (h)	Control	NPWT	Hazard ratio†, ‡	P	P for interaction
< 48	9 (8–13·75) (n = 18)	7·5 (5·25–8) (n = 16)	2·26 (1·11, 4·61)	0·025	0·330
≥ 48	10·5 (9–14·75) (n = 36)	9 (7–11) (n = 31)	1·47 (0·90, 2·40)	0·121

Values are

^*median (i.q.r.);

^†values in parentheses are 95 per cent confidence intervals. NPWT, negative pressure wound therapy.

^‡Cox proportional hazards analysis adjusted for depth and anatomical location.