Skip to main content
. 2013 Mar 28;2013(3):CD002106. doi: 10.1002/14651858.CD002106.pub4

Varas 2005.

Methods RCT with randomisation technique and allocation concealment described. Blinding of participants and investigators (including outcome assessors) not reported.
Participants 14 patients (mean age 41 years) with partial thickness burns (mean %TBSA: 14.6)
Interventions Silver‐impregnated dressing (Acticoat) versus SSD application and removal twice daily
Outcomes Level of pain 
 Incidence of infection
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk "Random drawing of sealed envelopes from a box"
Allocation concealment (selection bias) Low risk "Sealed envelopes" in a box ‐ not possible for personnel to guess assignment
Blinding (performance bias and detection bias) 
 All outcomes High risk Different care protocols so blinding of participants and investigators not feasible ‐ not mentioned if assessors blinded
Incomplete outcome data (attrition bias) 
 All outcomes High risk 4 of 14 patients were excluded because their burns did not meet eligibility criteria, 6 more patients dropped out (5 because of more pain with control treatment), leaving 4/14 patients remaining in the study. This is likely to cause significant bias because the primary outcome was a comparison of pain scores.
Selective reporting (reporting bias) Low risk All prespecified outcomes reported, although not possible to measure healing times because of difficulties in the study. Adverse events also measured.
Other bias Unclear risk Patients acted as own control, giving rise to potential unit of analysis errors