This dataset provides an overview of hospital-level quality as it relates to a set of potentially preventable hospital-related events associated with harmful outcomes for patients. The Centers for Medicare & Medicaid Services (CMS) Patient Safety and Adverse Events Composite (CMS PSI 90) is a subset of the AHRQ Patient Safety Indicators that are more relevant for the Medicare population utilizing International Classification of Diseases, Tenth Revision (ICD-10) data. The Agency for Healthcare Research and Quality (AHRQ) developed measures that health providers can use to identify potential inhospital patient safety problems for targeted institution-level quality improvement efforts. These Patient Safety Indicators (PSIs) are comprised of 26 measures that highlight safety-related adverse events occurring in hospitals following operations, procedures, and childbirth. The PSIs were developed after a comprehensive literature review, analysis of available ICD codes, review by clinical panels, implementation of risk adjustment, and empirical analyses. In the modified version of PSI 90 (v6.0), weighting of the individual component indicators is based on two concepts, the volume of the adverse event and the harm associated with the adverse event.
– The volume weights were calculated based on the number of safety-related events for the component indicators in the all-payer reference population.
– The harm weights were calculated by multiplying empirical estimates of the probability of excess harms associated with each patient safety event by the corresponding utility weights.
These excess harm probabilities were estimated by comparing patients with a safety-related event to very similar, otherwise eligible patients without that safety-related event over up to one year after the discharge during which the index event happened.