Table 2.

Age- and sex-adjusted incidence of end-stage renal disease in KPSC population and Creatinine SureNet population, by year and all years combined, 2008–2015

Population	2010	2011	2012	2013	2014	2015	All years combined
KPSC population, excluding cohort
New cases	1279	1212	1178	1215	1362	1383	7629
Population at risk	3,244,757	3,383,365	3,479,530	3,544,815	3,662,032	3,902,995	21,217,493
Ratea	40.0	36.4	33.9	33.4	35.7	33.9	35.4
Standard error	1.1	1.1	1.0	1.0	1.0	0.9	0.4
SureNet population
New cases	8	5	12	18	18	22	83
Population at risk	6041	7835	9093	9826	9771	9092	61,228
Ratea	116.4	44.8	75.6	117.3	112.0	229.6	94.7
Standard error	50.1	23.9	23.2	30.7	27.6	82.0	12.8
SureNet population relative to the overall KPSC populationb
Relative risk	2.91	1.23	2.23	3.51	3.14	6.77	2.68
Standard error	0.43	0.53	0.31	0.26	0.25	0.36	0.14
p value	0.013	0.698	0.009	< 0.001	< 0.001	< 0.001	< 0.001

^aAll rates are reported as per 100,000 KPSC members.

^bRelative risk (RR) is the ratio of the SureNet population relative to the overall KPSC population, and the reported p value is for the 2-sided test of the null hypothesis that RR = 1. KPSC = Kaiser Permanente Southern California.