Study	Reason for exclusion
Board 2008	Not randomized ‐ first 12 patients were control group followed by next 12 assigned to warmed irrigation fluids
Carli 1986	Several interventions vs none
Carli 1989	Multiple interventions
Cavallini 2005	Multiple interventions ‐ control group with standard surgical drapes vs fluid warming and forced air warming concurrently
Chan 1989	Multi‐intervention
Dai 2010	Multiple interventions
Dyer 1986	Sublingual temperature, not core temperature
Ellis‐Stoll 1996	Compared 2 methods of warming fluids ‐ prewarmed vs in‐line warming
Evans 1994	Multiple interventions
Gerig 1979	No information on formation of comparison groups
Heathcote1986	Not randomized
Kiessling 2006	Active warming vs warmed fluids and thermal insulation
Monga 1996	Oral temperature, not central
Neoh 1989	Axilliary temperature, not core temperature
Okeke 2007	Oral temperature, not central
Park 2007	Not an RCT, before‐and‐after study
Park 2009	Retrospective study
Patel 1996	Compares 2 different fluid warming methods
Patel 1997	Multiple interventions ‐ control group with reflective blankets and warmed fluids vs forced air warming with room temperature fluids
Szlyk‐Augustyn 2002	Multiple interventions
Xu 2004	Multiple interventions
Yamauchi 1998	All patients were on cardiopulmonary bypass

RCT = randomized controlled trial.