Introduction Recent changes in the management of hip fracture surgery patients may have resulted in changes in the epidemiology of venous thromboembolism (VTE). We aimed to determine the incidence of and predictive risk factors for symptomatic VTE and mortality, and the use of VTE prophylaxis, in hip fracture surgery patients.

Methods Hip fracture surgery patients were enrolled in 525 hospitals in France between October 1 and November 30, 2002 in this prospective, multicenter, epidemiological study. VTE was assessed by a critical events committee at 3 months. Risk factors were identified using logistic regression.

Results Data were from 6860 (97%) of 7019 enrolled patients. Median age was 82 years and 76% were women. 47% were femoral neck and 53% trochanteric or subtrochanteric fractures. All were operated on (osteosynthesis 57%, half prosthesis 35% and THR 8%).

Prophylaxis with a low-molecular-weight heparin (LMWH) was administered perioperatively in 97.6% and for at least four weeks in 69.5% (median prophylaxis duration: 6 weeks). The rate of symptomatic VTE at 3 months was 1.34% (95% CI: 1.04– 1.64). There were 16 PE (rate 0.25%) and 3 were fatal. The rate of major bleeding was 1.2%. At 6 months, 1006 patients (14.7%) were dead. Significant risk factors for symptomatic VTE were: history of VTE (OR 2.9), induction of anesthesia until arrival in the recovery room > 2 hrs (OR 2.5), and varicose veins/post-thrombotic syndrome (OR 2.2). LMWH prophylaxis significantly reduced the risk of symptomatic VTE (OR 0.2).

Significant predictive factors for mortality were: cancer (OR 2.3), surgical complications requiring re-intervention (OR 1.8), confusion before fracture (OR 1.8), ASA score ≥3 (OR 1.7), BMI ≤18 kg/m2 (OR 1.6), congestive heart failure (OR 1.6), atrial fibrillation (OR 1.6) and age > 80 years (OR 1.1).

Conclusions Extended LMWH prophylaxis is applied widely after hip fracture surgery in France. The current rate of postoperative VTE is low. However, a major change in the care of these patients is needed because of the high mortality rate.