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Streamlining antibiotic use in community acquired pneumonia: A quality improvement initiative

Ciarkowski CE, Howard K, Imlay H, Wu C, Hopkins CL, Vaughn VM, Spivak ES

Journal of hospital medicine, 2026

1,416 participants

Abstract

Background: Evidence suggests a 3-day total duration and early transition to oral therapy is safe in hospitalized patients with community acquired pneumonia (CAP)-though such care is not standard in the United States. To implement these evidence-based practices, a multidisciplinary group led by a hospitalist and antimicrobial stewardship updated an order set targeted at non-intensive care unit (ICU) patients with CAP.

Objective: Here, we assess the impact of our intervention on diagnostic and antibiotic treatment measures and associated clinical outcomes.

Methods: This is a retrospective, pre/post, observational quality improvement study of non-ICU inpatients with CAP admitted to a single academic medical center. The order set defaulted to 1 day of ceftriaxone without empiric atypical coverage for most patients, automatic de-escalation to oral amoxicillin on Day 2, a shortened total antibiotic duration of 3 days, and appropriate laboratory utilization. Primary outcomes were antibiotic duration and azithromycin use. Clinical outcomes were also assessed.

Results: The pre (1/2019-12/2021, n = 777) and post (1/2022-12/2023, n = 1416) intervention periods were compared using generalized linear models and interrupted time series adjusted for known confounders. After implementation of the orderset, total antibiotic duration (6-5 days, adjusted rate ratio: 0.92, 95% confidence interval [CI]: 0.89-0.95, p < 0.01) and azithromycin use (62.4% [485/777] to 39.4% [558/1416], adjusted…

How strong is the evidence?

Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 1,416 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

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