Camus 1997.

Methods	Design: RCT Operative phase:intraoperative Withdrawals: none Setting: 1 centre (France) Sample size: 18 Funding: not stated
Participants	Age (range): 50 (24 – 65) years Gender (M/F): not stated ASA grade: not stated Surgery type: elective (non‐haemorrhagic abdominal surgery in the supine position lasting > 2 hrs) Surgery duration: > 2 hrs (eligibility: "at least two hours") Anaesthesia type: general
Interventions	Intervention (ABSW): n = 10 2 electric blankets (Electro Concept®, model cb2 and cb3) + single cotton sheet between skin and blankets Duration: during surgery Body area covered: legs to the pubis + head, trunk and arms Temperature setting at 40°C Control: n = 8 "No special precautions were taken to prevent hypothermia" Co‐interventions: anaesthetic gases were not actively warmed and IV fluids were infused at room temperature
Outcomes	Shivering (present/absent) Thermal skin lesions Fluids infused (no data reported)
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	Low risk	Independent observer blinded
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	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.
Other bias	Low risk	‐