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

Table 4

Univariate analysis assessing the association of the ECI with/without additional variables and mortality.

Categorical variable	OR	95% CI	value
ECI	0.98	(0.90–1.07)	0.708
Sex	0.90	(0.67–1.22)	0.498
Age	1.03	(1.02–1.04)	<0.0001
Division	1.20	(0.82–1.76)	0.356
Operation	0.52	(0.34–0.79)	0.002
Hemodialysis	1.52	(0.87–2.66)	0.146
Mechanical ventilation	6.33	(4.59–8.72)	<0.0001
Number of outpatient visits	1.00	(0.99–1.00)	0.169
Number of inpatient visits	1.08	(1.01–1.16)	0.024

<0.05; <0.01; <0.001; Abbreviations: ECI: Elixhauser Comorbidity Index; OR: odds ratio; CI: confidence interval.