Table 3. Preoperative Patient Characteristics Assessed as Potential Predictors of Survival after Cardiac Arrest during Anesthesia

* Because of missing data, the numbers of patients within categories of a given characteristic may not sum to 223.

†P  values from logistic regression assessing the univariate association of the given characteristic with immediate (≥ 1 h) and hospital survival. For this analysis, age was treated as a continuous variable, and all other characteristics were treated as classification variables using the categories indicated.

‡ Renal, hepatic, or respiratory.

ASA PS = American Society of Anesthesiologists physical status.