Leeth 2010.

Methods	Design: RCT Operative phase: preoperative Withdrawals: 37/147 (25%) not included in data analysis. Setting: 1 centre (USA) Sample size: 147 Funding: the forced‐air warming gowns were provided for the study at a discounted purchase price, the cost of which were absorbed by the study unit
Participants	Age (mean): 43/44 years Gender (M/F): 44/60 ASA grade: I ‐ III Surgery type: elective (head‐neck, upper extremity, core, and lower extremity surgery) Surgery duration: not stated Anaesthesia type: general
Interventions	Intervention (ABSW): n = 49 Forced‐air warming gowns: Bair Paws forced‐air warming gown (Arizant, Inc, Eden Prairie, MN) Duration: not stated Temperature: not stated Body area covered: not stated Control: n = 56 Warmed cotton blankets Duration: not stated Co‐interventions: not stated Room temperature: not stated
Outcomes	Thermal comfort (Likert 1 ‐ 5) Other outcomes reported not included in the review: Costs
Notes	Comparison 1
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not reported
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Baseline comparability of groups	Low risk	To a high extent according to Table 1
Co‐interventions equal between groups	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	High risk	142 participants randomized, 105 analysed. No description of causes or groups they belonged to
Selective reporting (reporting bias)	Unclear risk	We did not have access to the protocol, therefore we cannot exclude risk of selective reporting with the information provided
Other bias	Low risk