The Charlson Comorbidity Index - Text Mining Techniques for Healthcare Provider Quality Determination - page 164

Figure 2. Decision tree to predict mortality
NODE: 5
N: 2466
1: 69.5%
0: 30.5%
If the patient's age is between 47.5 and 73.5 with a Charlson Index of zero, the probability of non-
mortality is 71%.
IF 47.5 <= Age in years at admission < 73.5
AND charlson < 0.5
THEN
NODE: 12
N: 10671
1: 29.2%
0: 70.8%
The probability increases to 74% for mortality if the age is greater than 70.5 years and the Charlson
Index is greater than 0.
IF 70.5 <= Age in years at admission
AND 0.5 <= charlson
THEN
NODE: 15
N: 47294