Table 4. Procedural 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, duration of surgery was treated as a continuous variable, and all other characteristics were treated as classification variables using the categories indicated.

MAC = monitored anesthesia care; CVP = central venous pressure.