Table 2.

Crude trends in in-hospital and 1-year mortality among US veterans with and without AKI, 2009–2012

Patient Group	Total		2009		2010		2011		2012
	N at Risk	Rate	N at Risk	Rate	N at Risk	Rate	N at Risk	Rate	N at Risk	Rate
In-hospital mortality
All hospitalized patients	2,689,093	1.9	298,720	2.1	294,371	1.9	296,895	1.9	297,198	1.8
AKI serum creatinine	548,782	6.1	61,181	7.0	56,132	6.6	61,814	6.1	60004	6.1
AKI diagnosis code	329,573	5.9	23,614	8.4	26,859	7.2	31,606	6.5	34,282	5.8
Non-AKI	2,140,311	0.8	237,539	0.8	238,239	0.8	235,081	0.8	237,194	0.7
AKI KDIGO stage
Stage 1	451,427	4.5	50,139	5.0	46,085	4.7	50,674	4.5	49,009	4.5
Stage 2	18,375	13.8	2081	16.5	1844	16.7	2043	13.8	2102	13.1
Stage 3	55,450	12.7	6188	14.7	5615	13.9	6503	12.0	6196	12.4
AKI-D	23,530	16.4	2773	18.0	2588	17.6	2594	15.9	2587	17.0
AKI and eGFR≥60 ml/min per 1.73 m2	291,304	6.5	31,510	7.4	29,880	6.8	32,720	6.4	32,232	6.5
AKI and eGFR <60 ml/min per 1.73 m2	257,478	5.8	29,671	6.6	26,252	6.4	29,094	5.7	27,772	5.7
1-yr mortality
All hospitalized patients	2,689,093	16.4	298,720	16.4	294,371	16.4	296,895	16.4	297,198	16.6
AKI	548,782	27.7	61,181	27.2	56,132	26.7	61,814	26.6	60,004	26.7
AKI diagnosis code	329,573	30.7	23,614	29.6	26,859	28.6	31,606	27.7	34,282	28.1
Non-AKI	2,140,311	13.5	237,539	13.8	238,239	13.7	235,081	13.8	237,194	14.0
AKI KDIGO stage
Stage 1	451,427	25.3	50,139	24.9	46,085	24.7	50,674	24.6	49,009	24.9
Stage 2	18,375	36.1	2081	36.9	1844	32.8	2043	32.0	2102	31.5
Stage 3	55,450	37.9	6188	37.0	5615	34.8	6503	35.0	6196	34.3
AKI-D	23,530	40.8	2773	41.3	2588	40.3	2594	41.4	2587	39.7
AKI and eGFR≥60 ml/min per 1.73 m2	291,304	24.2	31,510	25.9	29,880	25.0	32,720	24.5	32,232	24.2
AKI and eGFR<60 ml/min per 1.73 m2	257,478	29.7	29,671	29.6	26,252	29.8	29,094	29.2	27,772	29.5

eGFR refers to baseline preadmission eGFR. KDIGO, Kidney Disease Improving Global Outcomes; AKI-D, dialysis-requiring AKI.