ROUTINE FIXATION OF HUMERAL SHAFT FRACTURES IS COST-EFFECTIVE: COST-UTILITY ANALYSIS OF 215 PATIENTS AT FIVE YEARS FOLLOWING INJURY

Abstract

The primary aim was to estimate the cost-effectiveness of routine operative fixation for all patients with humeral shaft fractures. The secondary aim was to estimate the cost-effectiveness of using a Radiographic Union Score for HUmeral fractures (RUSHU)<8 to facilitate selective fixation for patients at risk of nonunion.From 2008-2017, 215 patients (mean age 57yrs [17–81], 61% female) with a non-operatively managed humeral diaphyseal fracture were retrospectively identified. Union was achieved in 77% (n=165/215) after non-operative management, with 23% (n=50/215) uniting after nonunion surgery. The EuroQol Five-Dimension (EQ-5D) Health Index was obtained via postal survey. An incremental cost-effectiveness ratio (ICER) <£20,000 per quality-adjusted life-year (QALY) gained was considered cost-effective.At a mean of 5.4yrs (1.2–11.0), the mean EQ-5D was 0.736. Multiple regression demonstrated that uniting after nonunion surgery was independently associated with an inferior EQ-5D (beta=0.103, p=0.032). Routine fixation for all patients to reduce the nonunion rate would be associated with increased treatment costs (£1,542/patient) but confer a potential EQ-5D benefit of 0.120/patient. The ICER of routine fixation was £12,850/QALY gained. Selective fixation, based upon a RUSHU<8 at 6wks post-injury, would be associated with reduced treatment costs (£415/patient) and confer a potential EQ-5D benefit of 0.335 per ‘at-risk patient’.Routine fixation for patients with humeral shaft fractures, to reduce the nonunion rate observed after non-operative management, appears to be cost-effective at 5yrs post-injury. Selective fixation for patients at risk of nonunion based upon the RUSHU may confer greater cost-effectiveness, given the potential savings and improvement in EQ-5D.