. Author manuscript; available in PMC: 2017 Aug 1.

Published in final edited form as: Surgery. 2016 May 26;160(2):463–472. doi: 10.1016/j.surg.2016.04.013

Table 2.

Unadjusted and adjusted association between number of postoperative complications and mortality.

	No Postoperative Complications	One Postoperative Complication	Two Postoperative Complications	Three or more Postoperative Complications
30-day mortality
Unadjusted OR (95% CI)	1 (Reference)	2.36 (1.86, 3)^*	6.73 (5.34, 8.47) ^*	25.61 (21.08, 31.12) ^*
Adjusted OR (95% CI)^†	1 (Reference)	1.83 (1.43, 2.33) ^*	4.69 (3.7, 5.94) ^*	16.12 (13.13, 19.78) ^*
90-day mortality
Unadjusted OR (95% CI)	1 (Reference)	2.01 (1.75, 2.3) ^*	3.73 (3.22, 4.31) ^*	13.95 (12.46, 15.62) ^*
Adjusted OR (95% CI)^†	1 (Reference)	1.48 (1.28, 1.7) ^*	2.49 (2.14, 2.9) ^*	9.03 (7.99, 10.21) ^*

Abbreviations. OR, odds ratio; CI, confidence interval.

Denotes statistically significant findings at 0.05 significance level.

^†

Adjusted odds ratios were obtained adjusting for age group, gender, African-American ethnicity, insurance type, comorbidity score, type of operation, emergency surgery status, and weekend admission status.