Baseline temperatures were similar. After prewarming,
mean core temperature was an estimated 0.13 (0.02°C,
0.24°C) higher in the prewarmed patients compared with the
not prewarmed group (P = .03); temperature in patients who
were not prewarmed remained unchanged. Core temperature
decreased in both groups over the initial 30 minutes of anesthesia.
Thereafter, core temperature increased in both groups,
with both averaging more than 36°C after 1.5 hours of anesthesia
(Fig. 2). The treatment-by-time interaction was not