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Table 4 Univariate analysis of the nondelirium group and delirium group in the training set (postoperative factors)

From: Prediction model for delirium in patients with cardiovascular surgery: development and validation

Variable

Total

Non-delirium

group

Delirium group

t

P

n(%)/\({\bar{x}} \pm s\)

n(%)/\({\bar{x}} \pm s\)

n(%)/\({\bar{x}} \pm s\)

Postoperative MV

33.3 ± 71.5

21.8 ± 18.1

45.2 ± 99.4

−3.193

0.002*

Postoperative WBC

13.4 ± 4.3

13.3 ± 4.0

13.6 ± 4.5

−0.714

0.475

Postoperative Hct

0.31 ± 0.04

0.31 ± 0.04

0.31 ± 0.04

1.780

0.076

Postoperative ALT

48.6 ± 68.9

43.5 ± 47.5

53.9 ± 85.6

−1.498

0.135

Postoperative TBIL

25.8 ± 14.4

23.9 ± 13.3

27.9 ± 15.3

−2.713

0.007*

Postoperative serum albumin

31.6 ± 5.9

32.3 ± 6.1

30.9 ± 5.7

2.201

0.028*

Postoperative serum urea nitrogen

9.2 ± 3.5

8.8 ± 3.4

9.7 ± 3.6

−2.680

0.008*

Postoperative Cr

101.8 ± 41.7

93.4 ± 34.3

110.6 ± 46.7

−4.106

<0.001*

Postoperative serum sodium

146.0 ± 4.3

145.0 ± 4.0

147.2 ± 4.3

−5.336

<0.001*

  1. MV, mechanical ventilation; WBC, white blood cell; Hct, red blood cell specific volume haematocrit; ALT, alanine aminotransferase; TBIL, total bilirubin; Cr, serum creatinine