THE COSTS OF HEMIARTHROPLASTY AND INTERNAL FIXATION AS TREATMENT OF DISPLACED INTRACAPSULAR FEMORAL NECK FRACTURES: TWO-YEAR RESULTS OF A RANDOMIZED CONTROLLED TRIAL IN 222 UNSELECTED PATIENTS OVER 60 YEARS OF AGE

Abstract

The costs of hip fractures are high. For the individual suffering a hip fracture there are both physical and psychological costs. For society there are costs of medical attention such as hospital treatment, rehabilitation and an increased level of care. We aimed to assess whether total hospital and societal costs for the treatment of elderly patients with displaced femoral neck fractures differ between patients operated with either internal fixation or hemiarthroplasty.

Patients: 222 patients, 165 (74%) women, mean age 83 years, were randomized to either internal fixation or hemiarthroplasty and followed for 2 years. All patients, regardless of cognitive failure and poor function and health were included in the study. Patients underwent either a Charnley-Hastings bipolar cemented hemiarthro-plasty or closed reduction and internal fixation with two parallel cannulated screws (Olmed). Resource use in hospital, rehabilitation, community based care and nursing home use were prospectively included in the analysis.

Results: The average cost per patient for the initial hospital stay was significantly lower for patients in the internal fixation group compared to the hemiarthro-plasty group (€ 12,509 vs. € 16,923, p= 0.01). When all femoral neck fracture-related hospital costs, i.e. rehabilitation, re-operations and formal and informal contact with the hospital, were included, the cost was similar in two groups (€ 25,081 for internal fixation vs. € 26,828 for hemiarthroplasty, p= 0.52). Including all costs (all hospital admissions, cost of nursing home and community based care), there was a nonsignificant trend that internal fixation was the most expensive treatment, (€ 50,331 vs. € 42,615 (p=0.14)). Inpatient stay and nursing home use were the two must resource demanding items for both groups. Costs for re-operations was the area where the largest difference between the groups was found (€ 9,377 per patient for internal fixation vs. € 1,718 for hemiarthroplasty (p< 0.01).

Conclusion: The initial lower cost per patient for internal fixation as treatment of a femoral neck fracture cannot be used as an argument in favor of this treatment, since the difference in average cost per patient is more than outweighed by subsequent costs, mainly due to a higher re-operation rate after internal fixation than after hemiarthroplasty and a tendency to higher societal costs. The old orthopedic credo that internal fixation is the cheaper treatment, and thus should be preferred, could not be verified when other costs than the initial hospital stays were included.