Study	Reason for exclusion
Anzai 1989	Wrong population: fewer than 75% patients with PU
Baker 1981	Not a randomised controlled trial
Bale 2004	Wrong population: minority of patients with PU
Bazzigaluppi 1991	Not a randomised controlled trial
Becker 1984	Not a randomised controlled trial
Beele 2010	Wrong population: minority of patients with PU
Boykin 1989	Not a randomised controlled trial
Chirwa 2010	Wrong population: minority of patients with PU
Colombo 1993	Wrong population: minority of patients with PU
de Laat 2011	Wrong intervention
Della Marchina 1997	Not a randomised controlled trial
Gerding 1992	Wrong population: mixed stage 1 and higher PU stage 2+ under 75%.
Gorse 1987	Use of antiseptic/antibiotic not the only difference between intervention arms
Hartman 2002	Not a randomised controlled trial
Helaly 1988	Wrong population: minority of patients with PU
Ishibashi 1996	Wrong population: fewer than 75% patients with PU
Itani 2010	Wrong population: minority of patients with PU
Kim 1996	Wrong population: mixed stage 1 and higher PU stage 2+ under 75%.
Konychev 2013	Wrong population: minority of patients with PU
Kuroyanagi 1995	Not a randomised controlled trial
Lazareth 2012	Wrong population, not PU
Lee 2014	Wrong population: minority of patients with PU
LeVasseur 1991	Wrong intervention
Meaume 2005	Wrong population: minority of patients with PU
Motta 2004	Wrong population: minority of patients with PU
Munter 2006	Wrong population: minority of patients with PU
Parish 1984a	Wrong population: minority of patients with PU
Parish 1984b	Wrong population: minority of patients with PU
Rhodes 2001	Quasi‐randomised
Robson 1999	Wrong intervention
Romanelli 2008	Wrong population: minority of patients with PU
Saha 2012	Quasi‐randomised
Saydak 1990	Not a randomised controlled trial
Serra 2005	Not a randomised controlled trial
Shrivastava 2011	Wrong comparator
Sibbald 2011	Wrong population: not PU
Stevens 2002	Wrong population: minority of patients with PU
Thomas 1998	Wrong intervention
Trial 2010	Wrong population: minority of patients with PU
van der Cammen 1987	Wrong population: patients at risk of pressure sores
Wang 2014	Wrong intervention
Weheida 1991	Wrong population: Stage 1 pressure ulcers
Worsley 1991	Wrong population: minority of patients with PU
Yastrub 2005	No relevant outcomes
Yura 1984	Wrong population: fewer than 75% patients with PU
Zeron 2007	Wrong intervention