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. 2013 Mar 28;2013(3):CD002106. doi: 10.1002/14651858.CD002106.pub4

Gerding 1988.

Methods RCT with randomisation sequence generated by computer code and allocation concealment achieved by sealed numbered envelopes opened sequentially. Blinding of participants and investigators (including outcome assessors) not reported.
Participants 50 wounds in 47 patients (mean age: 19.6 years) with partial thickness burns (mean %TBSA: 6.3) less than 24 hours old. Chemical and electrical burns, grossly contaminated wounds, wounds more than 24 hours old and wounds treated with topical agents were excluded.
Interventions Biosynthetic dressing (Biobrane) versus twice‐daily application of SSD
Outcomes Time to complete wound healing 
 Level of pain 
 Need for surgery 
 Cost of dressing 
 Incidence of infection 
 Adverse events
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk "Computer generated codes"
Allocation concealment (selection bias) Low risk "Sealed numbered envelopes that were opened sequentially"
Blinding (performance bias and detection bias) 
 All outcomes High risk No blinding of participants, investigators or assessors
Incomplete outcome data (attrition bias) 
 All outcomes Low risk Exclusions (n = 4 of 47) not likely to be related to outcomes
Selective reporting (reporting bias) Low risk All prespecified outcomes reported
Other bias Low risk 50 wounds in 43 patients ‐ wounds randomised instead of patients, but unlikely to bias estimates