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Updated: Jun 24, 2026

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit

Published on: September 30, 2020

Do patient safety events increase readmissions?

Bernard Friedman¹, William Encinosa, H Joanna Jiang

¹Agency for Healthcare Research and Quality, 540 Gaither Road, Rockville, MD 20850, USA. bernard.friedman@ahrq.hhs.gov

|March 26, 2009

Summary

Hospital patient safety events significantly increase readmission risks and in-hospital deaths. Addressing these events is crucial for reducing healthcare costs and improving patient outcomes.

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Last Updated: Jun 24, 2026

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit

Published on: September 30, 2020

Area of Science:

Healthcare quality and safety research
Health services research
Patient safety

Background:

Adverse safety events in hospitals lead to increased costs through longer stays, treatments, deaths, and readmissions.
The impact of safety events on hospital readmissions is an understudied area, despite their significant financial implications.

Purpose of the Study:

To investigate the simultaneous effects of patient safety events on the risks of death and hospital readmission.
To analyze the relationship between specific types of safety events and their impact on patient outcomes.

Main Methods:

Analysis of a large dataset of nearly 1.5 million adult surgery patients from 1088 hospitals, utilizing 2004 statewide hospitalization data.
Inclusion of patients at risk for 9 types of patient safety events, with risk adjustment for illness severity, comorbidities, age, and payer group.
Development of separate and composite models to assess the impact of any safety event and specific types of safety events on mortality and readmission.

Main Results:

Approximately 2.6% of at-risk patients experienced at least one safety event.
Patients with a safety event had a 3-month readmission rate of 25% compared to 17% for those without.
In-hospital death rates were 9.2% for patients with a safety event versus 1.3% for those without. Risk-adjusted relative risk for 3-month readmission was 1.20 (P < 0.01).

Conclusions:

Hospital safety events are a significant driver of costly readmissions.
Further research is needed to quantify the full economic burden of safety events.
Strategies and incentives for health plans to enhance patient safety are warranted.