Postoperative mortality and complications associated with additional coexisting diseases in surgical patients with preoperative regular dialysis.

*Adjusted for age, sex, teaching hospital, coexisting disease and types of surgery and anesthesia.†The highest quintile of length of stay during the surgical admission (patient percentage for each group belonging to the highest quintile of length of stay [≥18 days] of the total patients as percentage of increased length of stay).‡NA, Not available due to small sample size.OR, odds ratio; CI, confidence interval; ICU, intensive care unit; NA, not available.