The Charlson Comorbidity Index - Text Mining Techniques for Healthcare Provider Quality Determination - page 180

+code995
+code785+code250+code414+code197+code780+code507+code403+code198+code285+code707;
run ;

We could also have defined cutpoint levels in the frequency of mortality to define a series of weights
for this New Index. Table 21 shows the relationship of this new index to mortality.
Note that as the index increases, so does the level of mortality to a peak at index level 10. Figure 13
show the relationship. Note that the curve is very smooth, with each higher index level having a cor-
respondingly higher mortality rate. Moreover, the rate accelerates as the index increases. It follows a
natural curve that can be modeled.

Table 21. Mortality by new index code

Table of newindex by DIED
newindex DIED Total

Frequency
Row Pct
Col Pct

0 1

0 3121856

99.77
39.90

7189
0.23
4.30

3129045

1 1420115

99.24
18.15

10921
0.76
6.53

1431036

2 1221538

98.42
15.61

19558
1.58
11.70

1241096

3

955517
97.16
12.21

27925
2.84
16.71

983442

4 609314

94.93
7.79

32536
5.07
19.47

641850

5 315583

91.20
4.03

30444
8.80
18.21

346027

6 129128

85.46
1.65

21964
14.54
13.14

151092

7 40966

77.89
0.52

11626
22.11
6.96

52592

8 9395

69.43
0.12

4136
30.57
2.47

13531

9 1346

63.22
0.02

783
36.78
0.47

2129

10 99

59.28
0.00

68
40.72
0.04

167