Table 5.

Risk-adjusted incremental mortality associated with postoperative complications stratified by occurrence of acute kidney injury.

	Patients with no acute kidney injury (n=30670)			Patients with acute kidney injury (n=19644)
Postoperative Complications	n (% of no AKI patients)	Risk-Adjusted 90-day mortality % (95%CI)	Risk-Adjusted hospital mortality % (95%CI)	n (% of AKI patients)	Risk-Adjusted 90-day mortality % (95%CI)	Risk-Adjusted hospital mortality % (95%CI)
Patients with no other complications	15426 (50.3)	1.6 (1.4, 1.9)	<0.001 (<0.001, <0.001)	3723 (19.0)	3.5 (2.8, 4.1) a	0.3 (0.1, 0.4)a
Pulmonary complications and/or mechanical ventilation	4932 (16.1)	3.1 (2.7, 3.5)	1.4 (1.2, 1.7)	10594 (53.9)	13.2 (12.6, 13.8)a	10.4 (10.0, 10.9)a
Cardiovascular complications and/or need for vasopressors	3738 (12.2)	3.4 (2.9, 3.9)	1.4 (1.1, 1.6)	8048 (41.0)	16.0 (15.2, 16.8)a	12.6 (12.0, 13.3)a
Procedural complications	1567 (5.1)	2.5 (1.8, 3.2)	0.9 (0.6, 1.3)	2532 (12.9)	13.4 (12.3, 14.5)a	10.9 (9.9, 11.8)a
Neurological complications and/or delirium	1570 (5.1)	4.4 (3.6, 5.1)	1.5 (1.1, 1.8)	2467 (12.6)	13.9 (12.9, 15.0)a	10.2 (9.32, 11.0)a
Mechanical wound complications and surgical infections	876 (2.9)	1.0 (0.4, 1.6)	0.2 (0, 0.5)	1514 (7.7)	9.7 (8.5, 10.9)a	8.8 (7.7, 9.8)a
Severe sepsis	65 (0.2)	6.1 (2.7, 9.6)	1.9 (0.8, 3.0)	2237 (11.4)	21.2 (19.7, 22.6)a	17.2 (16.1, 18.3)a
Gastrointestinal complications	619 (2.0)	1.1 (0.3, 1.9)	0.3 (0, 0.7)	976 (5.0)	10.3 (8.6, 12.0)a	8.4 (6.9, 9.9)a
Venous thromboembolism	308 (1.0)	2.7 (1.4, 3.9)	0.4 (0, 0.8)	1140 (5.8)	11.3 (10.0, 12.7)a	8.0 (7.0, 9.0)a

Abbreviations. CI, confidence interval.

The risk-adjusted relative mortality rates were derived using generalized linear models adjusted for age, gender, ethnicity, primary payer, Charlson Comorbidity Index, surgery type, emergent surgery status, and weekend admission, estimated GFR (glomerular filtration rate), and all postoperative complications.

^aP<0.05 using t-test to compare to no acute kidney injury group.