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Evaluation of the volume-value relationship in hip fracture care using evidence-based thresholds

Sergio M Navarro, William C Frankel, Heather S Haeberle, Damien G Billow, Prem N Ramkumar
Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy 2019 March 26, : 1120700019837130

BACKGROUND: Studies have shown high-volume surgeons and hospitals deliver higher value care. The aims of this study were to establish meaningful thresholds defining high-volume surgeons and hospitals performing hip fracture surgery and to examine the relative market share of hip fracture cases using these surgeon and hospital strata.

METHODS: We performed a retrospective cohort study in a database of 103,935 patients undergoing hip fracture repair. We generated stratum-specific likelihood ratio (SSLR) models of a receiver operating characteristic (ROC) curve using length of stay (LOS) and cost value metrics. Volume thresholds predictive of decreased LOS and costs for surgeons and hospitals were identified.

RESULTS: Analysis of annual surgeon hip fracture volume produced two volume categories for LOS and cost: 0-30 (low) and 31+ (high). Analysis of LOS by annual hospital hip fracture volume produced strata at: 0-59 (low), 60-146 (medium), and 147 or more (high). Analysis of cost by annual hospital volume produced strata at: 0-125 (low) and 126+ (high). LOS and cost both decreased significantly ( pā€‰<ā€‰0.05) in progressively higher volume categories. Low-volume surgeons performed the majority of hip fracture cases, although they were performed at medium- or high-volume centres.

CONCLUSIONS: This study demonstrates a direct relationship between volume and value, translating to improvement in hip fracture care delivery for both surgeons and hospitals. Higher volume hospitals while lower volume surgeons perform the majority of hip fracture cases, suggesting optimisation opportunities. However, systems-based practices at the hospital level likely drive value to a greater extent than individual surgeons.


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