Table 1 Patients characteristics

Age (years) mean ± SD

70.6 ± 9.6

71.7 ± 10.6

n.s.

Sex (male)

93 (37%)

82 (33%)

n.s

Weight (kg) mean ± SD

71.3 ± 15.3

71.4 ± 14.9

n.s

Predisposing risk factor

Smoker

43 (17%)

41 (17%)

n.s.

Previous hip surgery

76

84

n.s.

Previous DVT

9 (4%)

19 (8%)

0.047

Previous pulmonary embolism

2 (1%)

11 (4%)

0.011

Obesity

46 (19%)

58 (23%)

n.s.

Hypertension

57 (23%)

71 (29%)

n.s.

Frequent bleeding episodes

2 (0.8%)

0 (0.0%)

n.s.

Leg edema

68

87

n.s.

Varices

90 (36%)

87 (35%)

n.s.

Varicous ulcer

12 (4.8%)

18 (7.3%)

n.s.