Postoperative mortality and complications associated with hypertension or diabetes mellitus in surgical patients with preoperative regular dialysis.*

*Adjusted for age, sex, teaching hospital, coexisting disease and type of surgery and anesthesia.†The highest quintile of length of stay during the surgical admission (the patient percentage for each group belonged to the highest quintile of length of stay [≥18 days] of the total patients as percentage of increased length of stay).OR, odds ratio; CI, confidence interval; ICU, intensive care unit.