Table 3.

Main risk factors related to PE.

Pt	Surgery time (min)	Blood transfusion	History of surgery in the past month	Malignant tumor	History of smoking within one year	History of VTE	Family history of VTE	Varicose veins	Had concomitant DVT
1	48	None	Yes	None	None	None	None	None	None
2	55	None	Yes	None	Yes	None	None	None	None
3	80	None	Yes	None	Yes	None	None	None	None
4	135	None	Yes	None	Yes	None	None	None	Yes
5	40	None	Yes	None	None	None	None	None	Yes
6	43	None	Yes	None	Yes	None	None	None	None
7	20	None	Yes	None	None	None	None	None	Yes
8	47	None	Yes	None	Yes	None	None	None	None

PE, pulmonary embolism; VTE, venous thromboembolism; DVT, deep vein thromboses.