C. K. Zogg1,2,3, D. Metcalfe3, A. Judge4, D. C. Perry3, M. L. Costa3, B. J. Gabbe5, A. H. Haider2 1Yale University School Of Medicine,New Haven, CT, USA 2Brigham And Women’s Hospital,Center For Surgery And Public Health,Boston, MA, USA 3University of Oxford,Oxford, United Kingdom 4University of Bristol,Bristol, United Kingdom 5Monash University,Melbourne, Australia
Introduction: Since passage of the Patient Protection and Affordable Care Act in 2010, Medicare has renewed efforts to improve the quality of older adult health through the introduction of an expanding set of outcome-based readmission and mortality pay-for-performance (P4P) measures. Among trauma patients, potential P4P has met with mixed success given concerns about the heterogeneous nature of patients that trauma providers treat and resultant variations in outcome measures. A novel approach taken by the National Health Service in England could offer a viable alternative plan. The objective of this study was to assess the effectiveness of the 2007-2010 English provider consensus-driven, process measure-based P4P Hip Fracture Best Practice Tariff (BPT) on improving trauma outcomes.
Methods: Quasi-experimental interrupted time-series and difference-in-difference analysis of 2000-2014 death certificate-linked data from England (Hospital Episode Statistics), Scotland (Scottish Morbidity Records), and the United States (100% Medicare all-payer claims). The study compared before-and-after differences in English temporal trends relative to those of Scotland and the US. Outcomes included: 30/90/365-day mortality, readmission, index hospital length of stay, and time to surgery. The study also assessed projections for the number of lives saved and readmissions averted were the BPT to be implemented in Scotland and the US.
Results: A total of 878,860 English, 97,487 Scottish, and 2,994,748 US index fractures were included among adults ≥65y. Following BPT introduction in England, 30-day mortality decreased instantaneously by an absolute value of -2.6 (95%CI -3.5, -1.7) percentage-points and continued to drop by an average of -0.2 (-0.4, -0.1) percentage-points per year (DID-Scotland: -1.6; DID-US: -2.2). 90-day mortality decreased more precipitously, dropping by an absolute value of -5.6 (-7.1, -4.2) percentage-points and an annual average thereafter of -0.2 (-0.5, 0.0) percentage-points per year (DID-Scotland: -1.9; DID-US: -2.9). Similar improvements were observed in readmission (e.g. 30-day ITSA: -1.4 [-2.3, -0.5]), time to surgery, and length of stay. Projections suggest that were the BPT to be implemented in Scotland and the US (Figure), by 2030, as many as 1,377 Scottish and 11,434 US lives could be saved.
Conclusion: In contrast to outcome-based P4P, process measure P4P such as that implemented through the English Hip Fracture BPT could result in significant improvements in outcomes for US patients while remaining more applicable to heterogeneous trauma populations and acceptable to trauma providers. As efforts to improve older adult health continue to increase, there are important lessons to be learned from initiatives like the BPT
