Table 3.

C-Statistic (95% CI) for the 2-year and 5-year KFRE by age category

C-Statistic (95% CI) for the KFRE by age category
Age category	2-yr KFRE	5-yr KFRE
Total population	0.77 (0.75–0.79)	0.76 (0.74–0.78)
<60 yr	0.77 (0.74–0.80)	0.75 (0.72–0.78)
60–69 yr	0.77 (0.73–0.80)	0.77 (0.74–0.80)
70–79 yr	0.76 (0.71–0.81)	0.75 (0.71–0.80)
≥80 yr	0.73 (0.65–0.80)	0.76 (0.68–0.84)

C-statistic, concordance statistic; KFRE, kidney failure risk equation.