Medical resource utilization and costs for total hip arthroplasty: benchmarking an anterior approach technique in the Medicare population.

Aims: The anterior approach (AA) for total hip arthroplasty (THA) is associated with more rapid recovery when compared to traditional approaches. The purpose of this study was to benchmark healthcare resource utilization and costs for patients with THA via AA relative to matched patients. Materials and methods: This study queried Medicare claims data (2012-2014) to identify patients who received THA via an AA from experienced surgeons, and matched these patients to a control cohort (all THA approaches). Direct and propensity-score matching were employed to maximize similarity between patients and hospitals in the two cohorts. Hospital length of stay (LOS), the proportion of patients discharged to home or home health, and post-acute claim payments during the 90-day episode were assessed. Generalized estimating equations were applied to control for imbalances between the cohorts and clustering of outcomes within hospitals. Results: A total of 1,794 patients were included after patient matching. Patients who received AA had significantly lower mean hospital LOS vs patients in the control group (2.061.36 vs 2.98 +/- 1.58 days, p<.0001). The adjusted proportion of patients discharged to home was nearly 20 percentage points higher in the AA cohort vs the control cohort (87.3% vs 68.7%, p<.0001). Post-acute claim payments for AA patients were nearly 50% lower than those for control patients ($4,139 vs $7,465, p<.0001). Conclusion: AA patients had significantly lower post-acute care resource use when compared to control patients. Further research is warranted to evaluate the cost effectiveness of AA among surgeons of varying experience levels.