From: Risk factor analysis and a new prediction model of venous thromboembolism after pancreaticoduodenectomy
Training set
VTE (%)
Validation set
VTE
Non-VTE
PT(s)
≦ 9
1
2
33.3
0
100.0
9–15
54
213
20.2
14
52
21.2
≧ 15
11
7.7
0.0
APTT(s)
≦23
23–38
55
203
21.3
50
21.9
≧ 38
22
4.5
4
20.0