Table 1 Patients with PE

Age, years (mean ± SD)

64.1 ± 10.1

Male/female (number)

34/42

BMI, kg/m² (mean ± SD)

26.0 ± 3.5

Tumor (number)

 Breast cancer

20

 Digestive system cancer^a

33

 Thoracic tumor^b

18

 Genital urinary tract tumor^c

4

 Melanoma

1

Coexisting conditions (number)

 Hypertension

34

 Diabetes

13

 Varicose vein of lower limb

10

Accompanying infection (number)

 Pulmonary infection

5

 Abdominal infection

9

 Pleural infection

2

 Surgery incision infection

1

ICU admission (number)

56

Hemoglobin before surgery, g/L (mean ± SD)

131.4 ± 18.1