. Author manuscript; available in PMC: 2019 Mar 26.

Published in final edited form as: Crit Care Med. 2017 Nov;45(11):1863–1870. doi: 10.1097/CCM.0000000000002651

Table 2.

Discrimination of Acute Organ Failure Score (AOFS) claims-based model to predict 30-day mortality in the validation cohort (N=18,147)

Model^a	c-Statistic	95% Confidence Interval
Original AOFS	0.644	0.639–0.649
Modified AOFS	0.721	0.711–0.730
Modified AOFS with COPS2	0.737	0.728–0.747
Modified AOFS with Elixhauser	0.748	0.739–0.757

The Original AOFS used the β coefficients from the published model [11]; the Modified AOFS included the same variables as the Original but used β coefficients derived from the Medicare cohort; the COPS2 and Elixhauser index replaced the Charlson Comorbidity index in the modified AOFS