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. 2017 Jul 12;2017(7):CD011821. doi: 10.1002/14651858.CD011821.pub2

Shahzad 2013.

Methods Country where data collected: Pakistan
Parallel‐group RCT
Unit of randomisation: participant
Unit of analysis: participant
Duration: treatment duration until healing (longest 60 days); 2 months' follow‐up
Participants Inclusion criteria: 2nd‐degree burns presenting within 24 h of injury and TBSA < 25%
Exclusion criteria: corrosive, electrical or chemical burns; history of diabetes, hypertension, epilepsy or kidney disease; pregnancy
Participants: 50 people attending the ED and admitted to burns unit
Mean age (years): 30.2 (15‐65); no significant difference between groups
Male participants: 17 vs 9
Burn type: flame 16 vs 11; scald 9 vs 14
Burn degree:
Burn size (%TBSA): 13.6 ± 4.7 (6‐25); no significant difference between groups
Burn location: NR
Interventions Intervention arm 1: A vera gel twice daily. N = 25
Intervention arm 2: 1% SSD twice daily. N = 25
Cointerventions: 3rd generation cephalosporins; fluid resuscitation, shock prevention/treatment; wound cleansing with Pyodine scrub and normal saline
Outcomes Primary outcome: wound healing
Primary outcome: infection
Secondary outcome: pain
Notes Funding NR
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk Quote: "Fifty patients with second degree burns were randomized (consecutive sampling method) into 2 groups."
Comment: no information on how randomisation sequence was generated
Allocation concealment (selection bias) Unclear risk Quote: "Fifty patients with second degree burns were randomized (consecutive sampling method) into 2 groups."
Comment: no information on whether allocation was adequately concealed
Blinding of outcome assessment (detection bias) 
 All outcomes High risk Quote: "At the time of change of dressing details regarding the condition of the wound such as signs of wound infection, condition of surrounding unburned tissues, discharge, smell, necrotic tissue and state of epithelialisation was noted by on every 3rd day. ...... The patients and attendants were given information regarding the Aloe Vera gel and SSD cream. Tape method was used to measure length and width of the wound and then these measurements were multiplied i.e. Area (in centimetre square) = length x width."
Comment: outcome assessment done at time of dressing change making it unblinded
Incomplete outcome data (attrition bias) 
 All outcomes Low risk Quote: "Among 25 patients treated with Aloe dressing, 24 patients had complete recovery while 1 had incomplete. In the SSD group, out of 25 patients, 19 patients had complete recovery and 6 had hypertrophic scar formation or the development of contractures"
Comment: all randomised participants were included in the analysis
Selective reporting (reporting bias) Unclear risk Quote: "Patients were also reviewed for documentation of efficacy of treatment including time required for healing (epithelialization), pain scores, type of cultured organisms, wound colonization and infection, cost of treatment and mortality between both groups."
Comment: all the planned outcomes were reported adequately
Other bias Unclear risk Comment: No evidence of other sources of bias, but reporting insufficient to be certain