Incidence, Severity, and Outcomes of Acute Kidney Injury in Octogenarians following Heart Valve Replacement Surgery

Table 5

(a) Unadjusted Cox proportional hazard ratio for one-year mortality by AKI stage. (b) Adjusted Cox proportional hazard ratio for one-year mortality by AKI stage.

(a)  

AKI stage	HR (95% CI)	value
No AKI	1	Reference
Stage 1	1.04 (0.4–2.4)	0.92
Stage 2	3.7 (0.8–11.4)	0.08
Stage 3	15.9 (6.9–36.3)	<0.0001

Unadjusted.

(b)  

AKI stage	HR (95% CI)	value
No AKI	1	Reference
Stage 1	1.0 (0.4–2.4)	0.95
Stage 2	3.1 (0.7–10.3)	0.13
Stage 3	13.6 (5.4–33.9)	<0.0001

Adjusted for age and Charlson comorbidity score.