Key result
AHRQ Elixhauser Mortality Index predicts in-hospital mortality slightly less accurately than the extended Elixhauser index.
Why the study?
The study was conducted to validate the Elixhauser measure and the AHRQ Elixhauser Mortality Index for estimating in-hospital mortality using hospital administrative data in southern Italy.
Does the AHRQ Elixhauser Mortality Index accurately predict in-hospital mortality in an Italian hospital administrative dataset?
Observational
No
Does the AHRQ Elixhauser Mortality Index accurately predict in-hospital mortality in an Italian hospital administrative dataset?
The AHRQ Elixhauser Mortality Index showed moderate predictive ability (c-statistic 0.626) for in-hospital mortality in a southern Italian hospital dataset, lower than seen in other contexts.
Moderate discrimination cautions against sole use for risk adjustment; extends Elixhauser validation to Italian data but leaves open local recalibration needs.
The study of patients' comorbidities is a fundamental element in risk analyses or quality assessment of health care systems. In addition to Charlson's index, which is the most widely used in the literature, there is Elixhauser's index, which analyses the comorbidities of patients in the administrative flow by identifying 29 categories, thus being more accurate and precise. The aim of this work was to validate the use of the Elixhauser measure and the AHRQ Elixhauser Mortality Index to estimate in-hospital mortality within the AORN 'A. Cardarelli' hospital in southern Italy. To do this, it was first necessary to create a special Python script for the identification of Elixhauser classes. From the classes, it was possible to obtain the index, which was then investigated through the implementation of logistic regression. The c-statistic of the index was 0.626, slightly lower than the mortality predicted with the extended version of the Elixhouser of 0.666, but still lower than the validation results available in the literature for other contexts.
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Fidecicchi et al. (2024) conducted an observational in In-hospital mortality. AHRQ Elixhauser Mortality Index vs. Extended version of the Elixhauser index was evaluated on In-hospital mortality. The AHRQ Elixhauser Mortality Index predicted in-hospital mortality with a c-statistic of 0.626, slightly lower than the extended version of the Elixhauser index (c-statistic 0.666).
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