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Open Access 01-12-2021 | Antibiotic | Research

Poor clinical outcomes associated with suboptimal antibiotic treatment among older long-term care facility residents with urinary tract infection: a retrospective cohort study

Authors: Haley J. Appaneal, Theresa I. Shireman, Vrishali V. Lopes, Vincent Mor, David M. Dosa, Kerry L. LaPlante, Aisling R. Caffrey

Published in: BMC Geriatrics | Issue 1/2021

Abstract

Background

Antibiotic use is associated with several antibiotic-related harms in vulnerable, older long-term care (LTC) residents. Suboptimal antibiotic use may also be associated with harms but has not yet been investigated. The aim of this work was to compare rates of poor clinical outcomes among LTC residents with UTI receiving suboptimal versus optimal antibiotic treatment.

Methods

We conducted a retrospective cohort study among residents with an incident urinary tract infection (UTI) treated in Veterans Affairs LTC units (2013–2018). Potentially suboptimal antibiotic treatment was defined as use of a suboptimal initial antibiotic drug choice, dose frequency, and/or excessive treatment duration. The primary outcome was time to a composite measure of poor clinical outcome, defined as UTI recurrence, acute care hospitalization/emergency department visit, adverse drug event, Clostridioides difficile infection (CDI), or death within 30 days of antibiotic discontinuation. Shared frailty Cox proportional hazard regression models were used to compare the time-to-event between suboptimal and optimal treatment.

Results

Among 19,701 LTC residents with an incident UTI, 64.6% received potentially suboptimal antibiotic treatment and 35.4% experienced a poor clinical outcome. In adjusted analyses, potentially suboptimal antibiotic treatment was associated with a small increased hazard of poor clinical outcome (aHR 1.06, 95% CI 1.01–1.11) as compared with optimal treatment, driven by an increased hazard of CDI (aHR 1.94, 95% CI 1.54–2.44).

Conclusion

In this national cohort study, suboptimal antibiotic treatment was associated with a 6% increased risk of the composite measure of poor clinical outcomes, in particular, a 94% increased risk of CDI. Beyond the decision to use antibiotics, clinicians should also consider the potential harms of suboptimal treatment choices with regards to drug type, dose frequency, and duration used.

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Title: Poor clinical outcomes associated with suboptimal antibiotic treatment among older long-term care facility residents with urinary tract infection: a retrospective cohort study
Authors: Haley J. Appaneal
Theresa I. Shireman
Vrishali V. Lopes
Vincent Mor
David M. Dosa
Kerry L. LaPlante
Aisling R. Caffrey
Publication date: 01-12-2021
Publisher: BioMed Central
Keywords: Antibiotic
Care
Urinary Tract Infection
Published in: BMC Geriatrics / Issue 1/2021
Electronic ISSN: 1471-2318
DOI: https://doi.org/10.1186/s12877-021-02378-5

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