Table 1 Baseline characteristics of subjects.

From: Development and validation of a novel risk assessment model to estimate the probability of pulmonary embolism in postoperative patients

Variables

Overall (n = 25,926)

Training set (n = 15,922)

Testing set (n = 10,004)

P value

Age (median [IQR])

55.00 [45.00, 67.00]

55.00 [45.00, 67.00]

55.00 [44.00, 67.00]

0.553

Drinking (%)

6363 (24.5)

3898 (24.5)

2465 (24.6)

0.784

Malignant.tumor (%)

7058 (27.2)

4382 (27.5)

2676 (26.7)

0.178

Anticoagulant (%)

13,619 (52.5)

8405 (52.8)

5214 (52.1)

0.299

Lymphocyte.percentage.last (median [IQR])

0.27 [0.19, 0.34]

0.27 [0.19, 0.34]

0.27 [0.19, 0.34]

0.678

Neutrophil.percentage.max (median [IQR])

6.62 [5.83, 7.63]

6.62 [5.83, 7.63]

6.62 [5.82, 7.65]

0.971

Red.blood.cell.last (median [IQR])

4.39 [4.03, 4.75]

4.39 [4.03, 4.74]

4.39 [4.03, 4.75]

0.872

Total.bilirubin.last (median [IQR])

12.00 [9.00, 15.90]

12.00 [9.06, 15.88]

12.00 [9.00, 16.00]

0.514

Direct.bilirubin.last (median [IQR])

3.90 [2.90, 5.40]

3.90 [2.90, 5.39]

3.90 [2.90, 5.40]

0.489

Prothrombin.time.last (median [IQR])

13.00 [12.50, 13.60]

13.00 [12.50, 13.60]

13.00 [12.50, 13.60]

0.562

Fibrinogen.last (median [IQR])

3.28 [2.80, 3.90]

3.28 [2.80, 3.90]

3.28 [2.80, 3.90]

0.913

Label (%)

269 (1.0)

164 (1.0)

105 (1.0)

0.93

  1. Last: The last test results before the diagnosis of pulmonary embolism.
  2. Max: The maximum test results before the diagnosis of pulmonary embolism.