Moysés 2014.

Methods	Design: RCT Operative phase: intra‐ and postoperative Withdrawals: none Setting: 1 centre (Brazil) Sample size: 38 Funding: none reported
Participants	Age (mean): 57.5 yrs Gender (M/F): 21/17 ASA grade: not reported Surgery type: open gastrointestinal surgery Surgery duration (mean): > 2 hrs (214.6/291.6 mins) Anaesthesia type: general
Interventions	Intervention (ABSW1): n = 19 Thermal blanket (no further details are provided) Temperature set at: 38ºC Duration: intraoperative + during recovery Body area covered: lower limbs Intervention (ABSW2): n = 19 Thermal mattress (no further details are provided) Temperature set at : 37ºC beginning and 38ºC end Duration: intraoperative + during recovery Body area covered: underneath Co‐interventions: none reported Room temperature (mean): 20.7° ‐ 23.3°C
Outcomes	Fluids infused (crystalloids; starch) Transusion (RBC; plasma)
Notes	Comparison 2
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Drawing of envelopes
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Study is described as double‐blind but no details are provided
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Study is described as double‐blind but no details are provided
Baseline comparability of groups	Low risk	To a high extent according to Table 1
Co‐interventions equal between groups	Unclear risk	No details are reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	All randomized participants were analysed
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