1. Sensitivity analyses‐ bias.

Outcomes	Pooled results	Randomisation (studies with adequate sequence generation)	Allocation (studies with concealed allocation)	Assessors (studies with blinded assessors)	Dropout rate (studies with < 15% dropouts)
Proportion of pressure ulcers healed	1.99 (1.39 to 2.85) (n = 12)	2.12 (1.36 to 3.30) (n = 6)	1.98 (1.35 to 2.90) (n = 7)	1.93 (1.26 to 2.95) (n = 9)	2.34 (1.47 to 3.71) (n = 6)

Results are presented as RR (95% CI)
 n = number of studies included in analysis