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. 2016 Apr 21;2016(4):CD009016. doi: 10.1002/14651858.CD009016.pub2

Just 1993.

Methods Design: RCT
Operative phase: preoperative
Withdrawals: none
Setting: 1 centre (USA)
Sample size: 16
Funding: not stated
Participants Age (range): 64 (60/68 years)
Gender (M/F): 8/8
ASA grade: I – II
Surgery type: elective (total hip arthroplasty)
Surgery duration: > 2 hrs ( 174/180 mins)
Anaesthesia type: general
Interventions Intervention (ABSW): n = 8
Electric blanket (CM‐AN 220, Chromex, Le Mans, France) + sheet (warmed)
Duration: 90 mins preoperative
Temperature: set at 42°– 43°C
Body area covered: during surgery shoulders and thorax covered
Proportion covered: not stated
Control: n = 8
Paper shirt covered with cotton sheet
Duration: until during surgery
Control body area covered: during surgery ‐ covered shoulders and thorax
Proportion covered: not stated
Co‐interventions: Not stated
Outcomes Shivering (present/absent)
Thermal comfort of prewarming
Fluids infused (total) (ml)
Other outcomes reported not included in the review:
  • Dose of fentanyl

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 Shivering assessed by blinded investigator
Baseline comparability of groups Low risk To a high extent according to Table 1
Co‐interventions equal between groups Unclear risk None 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