Table 3. Risk-adjusted association between acute and chronic kidney disease and hospital and ninety-day mortality.

Variables	Hospital mortality Adjusted Odds Ratio (95% Confidence Interval)	Ninety-day mortality Adjusted Odds Ratio (95% Confidence Interval)
No known kidney disease	1 (Reference)	1 (Reference)
Acute Kidney Injury without chronic kidney disease	3.62 (1.9, 6.87)*	2.21 (1.49, 3.28)*
Acute kidney injury with chronic kidney disease	2.93 (1.38, 6.23)*	1.8 (1.07, 3.04)*
Chronic kidney disease with no acute kidney injury	2.28 (0.94, 5.53)	2.09 (1.17, 3.72)*
Female gender (vs. male)	1.1 (0.79, 1.54)	1.11 (0.85, 1.44)
Age, per 1-year increase	1.04 (1.02, 1.06)*	1.05 (1.03, 1.06)*
Charlson Comorbidity Index Score, per unit increase	1.23 (1.1, 1.38)*	1.25 (1.15, 1.36)*
Emergent surgery (vs. Elective)	1.99 (1.43, 2.77)*	2.56 (1.97, 3.33)*
Estimated glomerular filtration rate	0.99 (0.99, 1)*	0.99 (0.99, 1)
Postoperative Complications
Pulmonary complications and/or mechanical ventilation (vs. None)	5.06 (2.42, 10.56)*	1.68 (1.17, 2.4)*
Cardiovascular complications and/or need for vasopressors (vs. None)	9.83 (5.13, 18.86)*	2.53 (1.83, 3.51)*
Procedural complications (vs. None)	1.98 (1.39, 2.82)*	1.74 (1.28, 2.35)*
Infectious complications (vs. None)†	3.26 (2.32, 4.58)*	2.45 (1.8, 3.32)*
Other complications (vs. None)‡	1.77 (1.26, 2.48)*	1.94 (1.47, 2.56)*

^*p-value<0.05.

^†Infectious complications include severe sepsis and mechanical wound complications and/or surgical infections.

^‡Other complications include neurological complications, delirium, gastrointestinal complications and venous thromboembolism. Area under the receiving operating characteristics curves are 0.92 (95% confidence interval 0.91-0.93), and 0.85 (95% confidence interval 0.82- 0.87) for hospital and ninety-day mortality, respectively.