Factors associated with mortality between return from operating room and post-operative day 7.

Notes on table:
Unadjusted analyses.
Survivors form the reference category.
†Haldane’s estimator222, 231.Haldane’s estimator is used when cells have a very small or zero value. It calculates the OR as follows: ((TP+0.5)/(FN+0.5))/((FP+0.5)/(TN+0.5)): TP = true positive; FP = false positive.
#denotes that there was a 0 in one group.