Mortality index [Neurosurgery Wiki]

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====== Mortality index ======

The [[mortality]] index, or the [[ratio]] of observed to expected mortality, is a reported [[quality metric]] that has been assumed to directly reflect [[patient care]]. However, [[documentation]] and [[coding]] that does not use knowledge of how a reported mortality index is derived could reflect poorly on a hospital or service line.
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The standardised [[mortality]] index (SMI) is calculated, for a given group, as the [[ratio]] of the number of [[death]]s actually observed over a given period and the number of deaths that would have occurred over the same period if the group had been subject to the same age-specific mortality as the population as a whole. A ratio of more than 1 is interpreted as excess mortality in the group.
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It is a measure calculated from the observed or actual mortality and expected or predicted mortality based on documentation and risk assessment, is particularly utilized in neurosurgical services as a metric of
quality of care. Diagnosis and treatment provided at admission is defined by a diagnosis-related group (DRG) code that is generated at discharge and CMS determines reimbursement based on DRG codes, which are adjusted according to both ROM and SOI