Table 4 Logistic regression analysis of DVT

Age (y)

<50

134

1

0.8

0.20

0.02

1.69

0.14

0.24

0.03

2.07

0.20

50-59

166

6

3.6

reference

60-69

289

19

6.6

1.88

0.73

4.80

0.19

1.46

0.56

3.81

0.44

70-79

467

40

8.6

2.50

1.04

6.01

0.04

1.71

0.69

4.23

0.25

>=80

180

26

14.4

4.50

1.80

11.24

< 0.01

2.83

1.09

7.31

0.03

Sex

Men

535

25

4.7

reference

Women

701

67

9.6

2.16

1.34

3.46

< 0.001

1.82

0.97

3.39

0.06

Group

knee

211

31

14.7

2.65

1.47

4.79

0.00

2.12

1.13

3.96

0.02

hip

328

20

6.1

reference

neck

174

7

4.0

0.65

0.27

1.56

0.33

0.98

0.38

2.49

0.96

low back

523

34

6.5

1.07

0.61

1.89

0.81

1.27

0.68

2.38

0.45

BMI (kg/m2)

<18.5

53

7

13.2

1.78

0.76

4.13

0.18

18.5-24.9

674

53

7.9

reference

>=25.0

509

32

6.3

0.78

0.50

1.23

0.29

Smoking

No

713

63

8.8

reference

Yes

523

29

5.5

0.60

0.38

0.95

0.03

1.08

0.60

1.92

0.81

ASA

1

253

6

2.4

reference

2

856

73

8.5

3.84

1.65

8.93

0.00

2.80

1.15

6.83

0.02

3, 4

104

10

9.6

4.38

1.55

12.39

0.01

3.13

1.04

9.41

0.04

Hypertension

No

593

35

5.9

reference

Yes

643

57

8.9

1.55

1.00

2.40

0.05

0.87

0.54

1.41

0.57

Hyperlipidemia

No

936

67

7.2

reference

Yes

300

25

8.3

1.18

0.73

1.90

0.50

Diabetes

No

974

76

7.8

reference

Yes

262

16

6.1

0.77

0.44

1.34

0.35

Stroke

No

1,154

86

7.5

reference

Yes

82

6

7.3

0.98

0.42

2.32

0.96

Malignancy

No

1,090

73

6.7

reference

Yes

146

19

13.0

2.08

1.22

3.57

0.01

1.85

1.06

3.23

0.03