From: Construction and validation of a nomogram for predicting prolonged air leak after minimally invasive pulmonary resection
Risk categories
Predicted PAL risk (%)
Number of patients in validation cohort (n)
Incidence of PAL (n)
Observed frequency of PAL (%)
Low risk
< 10%
225
15
6.7
Intermediate risk
10%-20%
186
25
13.4
High risk
>20%
142
42
29.6