Administrative and Claims Data Help Predict Patient Mortality in Intensive Care Units by Logistic Regression: A Nationwide Database Study

Table 5

Predictive ability of the CCI combined with selected variables according to the C-statistic.

Score/measure	Inhospital mortality	30-day mortality	1-year mortality
Mortality (number, %)	(259, 16.11%)	(337, 20.96%)	(518, 32.21%)
APACHE II (C-statistic, 95% CI)	0.79 (0.77–0.82)	0.80 (0.78–0.82)	0.76 (0.74–0.79)
CCI (C-statistic, 95% CI)
Alone	0.61 (0.57–0.64)	0.62 (0.59–0.66)	0.67 (0.64–0.70)
+Age, sex	0.67 (0.64–0.71)	0.69 (0.66–0.72)	0.73 (0.71–0.76)
+Age, sex, MV (CCI: MODEL 2)	0.77 (0.74–0.80)	0.78 (0.75–0.80)	0.77 (0.75–0.79)
+Age, sex, MV, OP	0.78 (0.75–0.81)	0.79 (0.77–0.82)	0.78 (0.76–0.81)
+Age, sex, MV, OP, outvisits	0.79 (0.76–0.82)	0.79 (0.77–0.82)	0.78 (0.76–0.81)
+Age, sex, MV, OP, outvisits, dept	0.79 (0.76–0.81)	0.80 (0.77–0.82)	0.78 (0.76–0.81)
+Age, sex, MV, OP, outvisits, dept, H/D	0.79 (0.76–0.81)	0.80 (0.77–0.82)	0.78 (0.76–0.81)
+ age, sex, MV, OP, out-visits, dept, H/D, invisits (CC: MODEL 2)	0.79 (0.76–0.82)	0.80 (0.77–0.82)	0.80 (0.77–0.82)

Abbreviations: APACHE II: Acute Physiology and Chronic Health Evaluation II; CCI: Charlson Comorbidity Index; MV: mechanical ventilation; CI: confidence interval; OP: operation; outvisits: number of outpatient visits; dept: department; H/D: hemodialysis; invisits: number of inpatient visits. The CCI combined with age, sex, and MV was named as CCI: MODEL 2. The CCI combined with age, sex, MV, OP, outvisits, dept, H/D, and invisits was named as CCI: MODEL 1.