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Identification and assessment of a comprehensive set of structural factors associated with hospital costs in Switzerland

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  • Michael M Havranek
  • Josef Ondrej
  • Stella Bollmann
  • Philippe K Widmer
  • Simon Spika
  • Stefan Boes

Abstract

Structural factors can influence hospital costs beyond case-mix differences. However, accepted measures on how to distinguish hospitals with regard to cost-related organizational and regional differences are lacking in Switzerland. Therefore, the objective of this study was to identify and assess a comprehensive set of hospital attributes in relation to average case-mix adjusted costs of hospitals. Using detailed hospital and patient-level data enriched with regional information, we derived a list of 23 cost predictors, examined how they are associated with costs, each other, and with different hospital types, and identified principal components within them. Our results showed that attributes describing size, complexity, and teaching-intensity of hospitals (number of beds, discharges, departments, and rate of residents) were positively related to costs and showed the largest values in university (i.e., academic teaching) and central general hospitals. Attributes related to rarity and financial risk of patient mix (ratio of rare DRGs, ratio of children, and expected loss potential based on DRG mix) were positively associated with costs and showed the largest values in children’s and university hospitals. Attributes characterizing the provision of essential healthcare functions in the service area (ratio of emergency/ ambulance admissions, admissions during weekends/ nights, and admissions from nursing homes) were positively related to costs and showed the largest values in central and regional general hospitals. Regional attributes describing the location of hospitals in large agglomerations (in contrast to smaller agglomerations and rural areas) were positively associated with costs and showed the largest values in university hospitals. Furthermore, the four principal components identified within the hospital attributes fully explained the observed cost variations across different hospital types. These uncovered relationships may serve as a foundation for objectifying discussions about cost-related heterogeneity in Swiss hospitals and support policymakers to include structural characteristics into cost benchmarking and hospital reimbursement.

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  • Michael M Havranek & Josef Ondrej & Stella Bollmann & Philippe K Widmer & Simon Spika & Stefan Boes, 2022. "Identification and assessment of a comprehensive set of structural factors associated with hospital costs in Switzerland," PLOS ONE, Public Library of Science, vol. 17(2), pages 1-17, February.
    • Handle: RePEc:plo:pone00:0264212
    DOI: 10.1371/journal.pone.0264212
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    References listed on IDEAS

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    1. Philippe K Widmer & Peter Zweifel & Mehdi Farsi, 2010. "Accounting For Heterogeneity In The Measurement of Hospital Performance," Economics Discussion / Working Papers 10-21, The University of Western Australia, Department of Economics.
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    1. Michael M. Havranek & Josef Ondrej & Philippe K. Widmer & Stella Bollmann & Simon Spika & Stefan Boes, 2023. "Using exogenous organizational and regional hospital attributes to explain differences in case‐mix adjusted hospital costs," Health Economics, John Wiley & Sons, Ltd., vol. 32(8), pages 1733-1748, August.

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