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Related Experiment Video

Updated: Jun 3, 2026

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat

Published on: April 24, 2009

SIR, you've led me astray!

David Birnbaum¹, Roxie Zarate, Anthony Marfin

¹Washington State Health Department, Olympia, WA, USA. david.birnbaum@doh.wa.gov

Infection Control and Hospital Epidemiology

|April 5, 2011

Summary

The standardized infection ratio (SIR) may inaccurately assess hospital performance. This metric can lead to different conclusions than other risk measures, making it unsuitable for public reporting of healthcare-associated infections (HAIs).

Area of Science:

Healthcare quality measurement
Epidemiology
Biostatistics

Background:

The standardized infection ratio (SIR) is a metric used for public reporting of healthcare-associated infections (HAIs).
SIR compares a hospital's infection rate to an expected number based on national data.
It is an indirectly standardized morbidity ratio.

Purpose of the Study:

To identify potential discrepancies between the SIR and other risk assessment measures.
To evaluate the reliability of SIR in reflecting actual healthcare-associated infection rates.

Main Methods:

Comparison of hypothetical and real-world data.
Utilized relative risk, directly standardized morbidity ratios, and SIR values.
Analysis across diverse hospital population compositions.

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Published on: February 10, 2011

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Last Updated: Jun 3, 2026

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Published on: April 24, 2009

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Published on: February 10, 2011

Main Results:

SIR calculations frequently yielded conclusions inconsistent with other unbiased estimators.
Other summary statistics aligned with underlying HAI incidence density rates.
Discrepancies were observed in both hypothetical and real data.

Conclusions:

Indirect standardization in SIR calculations can introduce distortions.
SIR may lead to incorrect assessments of hospital or state performance.
SIR's unsuitability for rank-order comparison makes it inappropriate for statewide HAI monitoring.