Fig. 6.
Adjusted probability of transfusion estimates versus integrated area above the core temperature versus time curve and below a threshold of 37°C, Estimates adjusted to an “at-risk” reference population defined by age > 55 yr, body mass index < 25 kg/m2, preoperative hemoglobin < 14 g/dl, and duration of surgery > 4 h. Shaded regions represent pointwise, Bonferroni-adjusted (for simultaneous analysis on two outcomes) 95% confidence intervals. The regression model was based on 45,866 patients who were admitted on the day of surgery and who had esophageal temperature monitoring. *Adjusted for year, type, and duration of surgery, body mass index, age, preoperative platelet count, preoperative hemoglobin, estimated blood loss, and individual anesthesiologist, as well as the Elixhauser comorbidities16 (see table 2 for a listing of these comorbidities).
Pr = probability.