Do functional status and Medicare claims data improve the predictive accuracy of an electronic health record mortality index? Findings from a national Veterans Affairs cohort

Table 2 Concordance statistics for the four models in the development and validation cohorts

Model	c-statistic (95% CI)
Model	Development cohort	Validation cohort
Base model	0.809 (0.805, 0.812)	0.804 (0.796, 0.812)
Base + function model	0.814 (0.810, 0.818)	0.809 (0.801, 0.816)
Base + Medicare model	0.813 (0.810, 0.817)	0.811 (0.803, 0.818)
Base + function + Medicare model	0.818 (0.814, 0.822)	0.814 (0.807, 0.822)

ISSN: 1471-2318