Table 3.

Predictive accuracy of different risk factors for 3-yr survival in the validation data set

Parameter	Discrimination ROC (95% CI)	R2
Single variables or case-mix domains
age	0.63 (0.62 to 0.65)	0.07
demographics (age, race, vintage, cause of ESRD)	0.64 (0.63 to 0.65)	0.07
comorbid conditions (as per top half Table 2)	0.67 (0.66 to 0.69)	0.10
physical impairmentsa	0.62 (0.61 to 0.63)	0.07
serum albumin	0.60 (0.59 to 0.61)	0.03
laboratory/clinical parametersb	0.67 (0.66 to 0.68)	0.09
Combining domains
demographics + laboratory/clinical parameters	0.69 (0.68 to 0.71)	0.13
demographics + comorbid conditions	0.70 (0.69 to 0.71)	0.14
demographics + laboratory/clinical parameters + comorbid conditions	0.72 (0.71 to 0.73)	0.17
demographics + laboratory/clinical parameters + physical impairmentsa	0.71 (0.70 to 0.72)	0.15
demographics + laboratory/clinical parameters + physical impairmentsa + comorbid conditions	0.73 (0.72 to 0.74)	0.18

ROC, receiver operating characteristic.

^aIncludes inability to ambulate, inability to transfer, and nursing home resident.

^bIncludes serum albumin, phosphate, creatinine, predialysis SBP, BMI, and type of vascular access.