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Table 3 C statistics indicating the predictability of each logistic regression model

From: Comparison of different comorbidity measures for use with administrative data in predicting short- and long-term mortality

 

In-hospital mortality

One-year mortality

 

AMI

COPD

AMI

COPD

 

c

95% CI

c

95% CI

c

95% CI

c

95% CI

Baseline model*

0.707

(0.695-0.720)

0.697

(0.684-0.710)

0.736

(0.726-0.746)

0.670

(0.664-0.676)

Index hospitalization only

        

   Baseline model + Charlson/Deyo

0.712

(0.701-0.726)

0.708

(0.697-0.723)

0.747

(0.738-0.757)

0.681

(0.675-0.687)

   Baseline model + Charlson/Romano

0.723

(0.712-0.737)

0.719

(0.707-0.733)

0.759

(0.750-0.769)

0.692

(0.687-0.698)

   Baseline model + Elixhauser

0.737

(0.729-0.753)

0.738

(0.729-0.754)

0.767

(0.760-0.778)

0.701

(0.696-0.707)

Index and prior hospitalizations

        

   Baseline model + Charlson/Deyo

0.721

(0.712-0.736)

0.718

(0.707-0.733)

0.766

(0.758-0.776)

0.711

(0.705-0.716)

   Baseline model + Charlson/Romano

0.729

(0.719-0.743)

0.726

(0.714-0.740)

0.773

(0.765-0.783)

0.714

(0.708-0.719)

   Baseline model + Elixhauser

0.736

(0.729-0.752)

0.731

(0.722-0.747)

0.777

(0.770-0.787)

0.716

(0.711-0.723)

  1. AMI = acute myocardial infarction; COPD = chronic obstructive pulmonary disease.
  2. *Variables in the baseline model included age, sex, race, and whether the patient received surgery.