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Using selected diagnoses to improve the Chilean capitation formula

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Author Info

  • Vargas, Veronica
  • Wasem, Jürgen

Abstract

Objectives: To contribute to the policy discussion of equity and health financing in Chile by evaluating the improvement in the capitation formula for paying PHC providers by using selected diagnoses. The socio-economic status of the municipalities and the urban/rural location of providers are used to adjust current capitation payments to providers. Issues have been raised about the ability of the formula to predict the utilization of PHC. In this study we test if adding individual information, such as age, gender and selected diagnoses improves the formula’s explanatory power. Age, gender and diagnosis are important variables because of their strong relationship to increased morbidity risk and to needs for preventive and reproductive health care respectively. Methods: A sample of 10,000 individuals was drawn and two years utilization-of- services data was collected from a region in Chile. Information on age, gender, socio-economic status and urban/rural residence, the number of preventive or curative visits and the presence of seven key diagnoses was collected. Regression analysis and two tests to identify the best model were performed: i) R-square, which measures the proportion of the variance in individual expenditures and ii) predictive-ratio which measures the accuracy of prediction at the group level (where 1.0 indicates perfect prediction). Conclusions: We recommend to add age, gender and two diagnoses; hypertension and diabetes to the current capitation formula. The explanatory power of this model at the individual level was 28.5% and at health centre level the predictive ratio was close to 1.0. --

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Bibliographic Info

Paper provided by Ernst Moritz Arndt University of Greifswald, Faculty of Law and Economics in its series Wirtschaftswissenschaftliche Diskussionspapiere with number 06/2002.

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Date of creation: 2002
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Handle: RePEc:zbw:grewdp:062002

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Postal: Friedrich-Loeffler-Str. 70 - 17489 Greifswald
Phone: (03834) - 86-2452
Fax: (03834) 86-2451
Web page: http://www.rsf.uni-greifswald.de/meta/english.html
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Related research

Keywords: capitation; risk adjustment; Chile health care system; primary health car;

References

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  1. B Hutchison & J Hurley & S Birch & J Lomas & S Walter & J Eyles & F Stratford-Devai, 1997. "Needs-based Primary Medical Care Capitation: Development and Evaluation of Alternative Approaches," Centre for Health Economics and Policy Analysis Working Paper Series 1997-10, Centre for Health Economics and Policy Analysis (CHEPA), McMaster University, Hamilton, Canada.
  2. Van de ven, Wynand P.M.M. & Ellis, Randall P., 2000. "Risk adjustment in competitive health plan markets," Handbook of Health Economics, in: A. J. Culyer & J. P. Newhouse (ed.), Handbook of Health Economics, edition 1, volume 1, chapter 14, pages 755-845 Elsevier.
  3. Arlene Ash & Randall P. Ellis & Gregory Pope & John Ayanian & David Bates & Helen Burstin & Lisa Iezzoni & Elizabeth McKay & Wei Yu, 2000. "Using Diagnoses to Describe Populations and Predict Costs," Papers 0099, Boston University - Industry Studies Programme.
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