Jeong 2008.

Methods	Single‐centre study in Korea
Participants	40 patients undergoing off‐pump coronary artery bypass surgery; 29 male, 11 female, average age 62 years Exclusion criteria: patients requiring inotropes or intra‐aortic balloon pump, preoperative temperature < 36°C or > 37°C, anticipated need for cardiopulmonary bypass, skin disease, hypersensitivity to skin adhesives
Interventions	Intravenous fluids warmed to 41°C (n = 20): mean volume infused crystalloid 2301.5 ± 1006.7, blood 400.5 ± 622.8 mL, anaesthesia time 280 ± 59 minutes No warmed fluids (n = 20): mean volume infused crystalloid 2191.2 ± 622.3 mL, blood 365.0 ± 437.1 mL, anaesthesia time 278 ± 53 minutes Both groups lay on a warming water mattress, and operating room temperature was maintained at 25°C
Outcomes	Hourly bladder temperature recorded intraoperatively; temperature at 4 hours postoperatively; blood loss; length of ICU stay; length of hospital stay
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	'Randomly allocated'
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not described
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described
Incomplete outcome data (attrition bias) All outcomes	Low risk	No loss to follow‐up
Selective reporting (reporting bias)	Low risk	No evidence of this
Other bias	Low risk	None