Table 5
Risk stratification using a derived score for prediction of complicated parapneumonic effusion or empyema
No of patients
Points
CPE/Emp
Uncomplicated pneumonia
%
−1
0
66
0
0
1
296
0.003
1
11
442
2.4
2
38
283
11.8
3
28
81
25.7
4
12
7
63.2
5
2
2
50*
6
0
0
–
*χ
2
, p<0.0001.
CPE/Emp, complicated parapneumonic effusion or empyema.