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Table 3 Model Performance for Predicting In-hospital Mortality

From: A comparison between the APACHE II and Charlson Index Score for predicting hospital mortality in critically ill patients

Model

Log Likelihood

Degrees of Freedom

P value for LR

Likelihood Ratio Test

C stat

AIC

(LR-2xdf)

Mean Shrinkage

Model A (Baseline model)

age sex APS *

-1882.01

   

0.743

 

0.97

Model B

age sex APS CHP†

-1843.92

1

<0.0001

76.17

0.757

74.17

0.97

Model C

Age, sex, APS, c. cob‡

-1814.69

17

<0.0001

134.64

0.768

100.64

0.94

Model D (D'Hoore)

Age, sex, APS, Charlson score

-1861.56

1

<0.0001

40.89

0.752

38.89

0.98

Model E

Age, sex, APS, Charlson score (excluded scores 6 and above)

-1701.14

1

<0.0001

11.92

0.757

9.92

1.01

Model F

APACHE II, Charlson score

-1652.67

   

0.813

 

0.99

Model G

APACHE II (with diagnosis)

-1670.11

   

0.808

 

1.00

  1. *APS is the acute physiology score derived from APACHE II by subtracting the age and the CHP components
  2. † CHP is the Chronic Health Points from the APACHE II score.
  3. ‡Charlson co-morbidities entered as individual dummy variables