Meta-analysis comparing prewarming strategies versus control

Meta-analysis comparing prewarming versus control on temperature in first hour. Treatment effect expressed as mean difference in temperature. Overall, prewarming increased temperature by an estimated 0.42°C (95% CI 0.27-0.57, p <0.001). Heterogeneity was observed (Q statistic p <0.001 and I² = 76%), but all point estimates of the treatment effect favored prewarming.