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Table 1 Univariate analyses of risk factors associated with preoperative DVT following Patellar fracture

From: Preoperative incidence and risk factors of deep vein thrombosis in patients with an isolated patellar fracture

Variables

NO. (%) without DVT (n = 779)

NO. (%) with DVT (n = 48)

P value

Gender

  

0.017

 Man

483 (62.0)

38 (79.2)

 

 Woman

296 (38.0)

10 (20.8)

 

Age (years)

51.6 ± 14.8

56.9 ± 15.4

0.016

Smoking

88 (11.3)

9 (18.8)

0.119

BMI, kg/m2

24.7 ± 3.3

24.2 ± 3.0

0.407

  < 18

182 (23.3)

17 (37.4)

 

 18–23.9

268 (34.4)

18 (37.5)

 

 24.0–27.9

256 (32.9)

8 (16.7)

 

  ≥ 28

73 (9.4)

5 (10.4)

 

Hypertension

175 (22.5)

11 (22.9)

0.942

Diabetes

94 (12.1)

5 (10.4)

0.733

Cerebrovascular disease

58 (7.4)

5 (10.4)

0.451

Chronic heart disease

182 (23.4)

15 (31.3)

0.213

Lung disease

5 (0.6)

1 (2.1)

0.253

Surgery history

147 (18.9)

7 (14.6)

0.459

Mean days from admission to operation (days)

4.2 ± 2.8

8.7 ± 4.6

0.001

Time from injury to DUS (days)

3.1 ± 2.7

7.6 ± 4.5

0.001

Time from injury to anticoagulation (days)

1.1 ± 0.7

1.3 ± 0.5

0.351

ASA

  

0.488

 I-II

691 (88.7)

41 (85.4)

 

 III-IV

88 (11.3)

7 (14.6)

 

TP (< 60 g/L)

70 (9.0)

8 (16.7)

0.077

ALB (< 35 g/L)

59 (7.6)

9 (18.8)

0.006

ALT (> upper limit)

61 (7.8)

8 (16.7)

0.032

AST (> upper limit)

31(4.0)

3 (6.3)

0.442

ALP (> upper limit)

8 (1.0)

2 (4.2)

0.053

HCRP (> 8 mg/L)

361 (46.3)

28 (58.3)

0.106

CK (> upper limit)

63 (8.1)

5 (10.4)

0.569

LDH (> 250 U/L)

61 (7.8)

7 (14.6)

0.098

TC (> 5.8 mmol/L)

124 (15.9)

5 (10.4)

0.308

TG (> 1.7 mmol/L)

150 (19.3)

9 (18.8)

0.931

GLU (> 6.1 mmol/L)

255 (32.7)

18 (37.5)

0.496

WBC (> 10*109/L)

182 (23.4)

17 (35.4)

0.058

NEUT (> 6.3*109 /L)

314 (40.3)

27 (56.3)

0.029

LYMT (< 1.8*109 /L)

167(21.4)

13 (27.1)

0.358

RBC (< lower limit)

195 (25.0)

14 (29.2)

0.522

HGB (< lower limit)

142 (18.2)

11 (22.9)

0.417

HCT (< lower limit)

341 (43.8)

23 (47.9)

0.575

PLT (> 300*109 /L)

24 (3.1)

4 (8.3)

0.051

PT (> 12.5 s)

9 (14.0)

1 (14.6)

0.568

PTA (< 80%)

46 (5.9)

3 (6.3)

0.922

INR (> 1.4)

25 (3.2)

1 (2.1)

0.664

APTT (< 28 s)

219 (28.1)

18 (37.5)

0.163

TT (> 17 s)

81 (10.4)

3 (6.3)

0.356

FIB (> 4 g/L)

118 (15.1)

11 (22.9)

0.150

FDP (> 5 mg/L)

129 (16.6)

13 (27.1)

0.061

D-dimer (> 0.5 ug/mL)

205 (26.3)

33 (68.8)

0.001

  1. Notes: ALT Alanine transaminase, reference range: female, 7–40 U/L; male, 9–50 U/L; AST Aspartate transaminase, reference range: female, 13–35 U/L; male, 15–40 U/L; ALP Alkaline phosphatase, reference range: female, 35–100 U/L; male, 45–125 U/L; CK Creatine kinase, reference range: female, 40–200 U/L; male, 50–310 U/L; CREA creatinine, reference range: female, 41–73 umol/L; male, 57–111 umol/L; UA Uric acid; reference range: female, 155–357 umol/L; male, 208–248 umol/L; RBC Red blood cell, reference range: Female, 3.5–5.0*1012/L; male, 4.0–5.5*1012/L; HGB Hemoglobin, reference range: Female, 110-150 g/L; male, 120-160 g/L; HCT Hematocrit, reference range: Female, 35–45%; male, 40–50%