Gong 2009.

Methods	Country where data collected: China Parallel‐group RCT Unit of randomisation: participant Unit of analysis: participant Duration: 21 days +
Participants	Inclusion criteria: age 20‐40; fresh burn wound; total burn < 10% TBSA; no infection in wound; non‐joint site Exclusion criteria: NR Participants 104 hospital patients Burn degree and size: superficial 2nd‐degree 7.4 ± 1.6cm2; deep 2nd‐degree 7.7 ± 1.4cm2 vs superficial 2nd‐degree 7.1 ± 1.5cm2; deep 2nd‐degree 7.3 ± 1.3cm2 All other characteristics NR
Interventions	Intervention arm 1: ionic silver dressing combined with hydrogel, changed every other day to 7 days and then covered with hydrogel. N = 52 Intervention arm 2: 1% SSD, changed every other day. N = 52 Cointerventions: anti‐infection treatment and nutrition support
Outcomes	Primary outcome: wound healing (proportion completely healed) Primary outcome: infection (detection rate of wound bacteria) Secondary outcome: adverse events
Notes	Article in Chinese, extracted and assessed for risk of bias by one review author, discussed with a second review author Funding NR
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote:“This prospective randomised trial was conducted according to the random number table” Comment: a random component in the sequence generation process was reported
Allocation concealment (selection bias)	Unclear risk	Comment: it did not state how randomisation sequence was allocated
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: no mention of blinding of key study personnel used
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: results section and tables show that all participant data were included in analysis
Selective reporting (reporting bias)	Unclear risk	Comment: protocol not obtained, based on paper only
Other bias	Unclear risk	No unit of analyses issues but reporting not sufficient to determine if other risks