Measure of specialty case-mix index based on standardization of patient groups distribution

Corresponding author: Lin De-nan

DOI: 10.12201/bmr.202005.00251

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  Abstract: Objective： To analyze the association between patient groups by diagnosis and case-mix index (CMI), and to explore the method of CMI standardization.Methods： Research data were obtained from the medical record summary of hospitalized patients with infectious diseases in Shenzhen in 2018, this paper described the patient distribution by DRGs, the proportion of cases by DRGs on the overall level was used as standard cases distribution of infectious patient to adjust the value of specialty CMI of infectious disease in each sampled hospital.Results： There was a statistically significant difference among major disease category (MDC) distribution in hospitals with hospitalized infectious disease patients（?2=6367.724, P<0.001）. The ranking of 14 hospitals changed after CMI adjustment than before. The coefficient of variation of CMI on the overall level decreased from 14.32 % to 12.26 % after the standardization adjustment process.Conclusion： Measure of specialty case-mix index based on standardization of patient groups distribution may reflect the relative difference level of per-case resource consumption between hospitals, and the result would be more similar to the clinical reality. The comparability of results should be considered when utilizing CMI to the evaluation of specialized medical service line.

  Key words: diagnosis-related groups; case-mix index; infectious diseases; standardization; shenzhen

  Submit time: 15 December 2020

  Copyright: The copyright holder for this preprint is the author/funder, who has granted biomedRxiv a license to display the preprint in perpetuity.
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