Effect of inappropriate empirical antimicrobial therapy on time to hospital discharge in patients with community-acquired acute pyelonephritis: a propensity score-weighted retrospective cohort study.
5 affiliations
- 1Universidad Icesi, Cali, Colombia. [email protected].
- 2Hospital Serena del Mar, Cartagena, Colombia. [email protected].
- 3Subdirección de investigaciones Fundación Cardioinfantil, Instituto de Cardiología, Bogotá D.C, Colombia.
- 4Universidad Nacional, Bogotá D.C, Colombia.
- 5ESE SUBRED CENTRO ORIENTE - Hospital Universitario Santa Clara, Bogotá D.C, Colombia.
Abstract
Background
Acute pyelonephritis is a common reason for emergency department admission. The increasing prevalence of resistant pathogens has raised concerns about the effectiveness of empirical therapy and has led to increased use of broad-spectrum antimicrobial therapy. This study aimed to evaluate the effect of inappropriate antimicrobial therapy on the clinical outcome of time to hospital discharge among patients with community-acquired acute pyelonephritis treated at a hospital in Cartagena, Colombia.Methods
We conducted an analytical retrospective cohort study including adult patients admitted to the emergency department with a diagnosis of acute pyelonephritis who received empirical antimicrobial therapy at a hospital in Cartagena, Colombia, between January 2021 and August 2025. Inappropriate therapy was defined as resistance to the empirical antibiotic documented by urine culture. The primary objective was to compare time to hospital discharge between patients treated with appropriate antimicrobial therapy and those who received inappropriate therapy. A balanced pseudopopulation was created using inverse probability of treatment weighting (IPTW), and a Cox proportional hazards regression model was fitted to evaluate time to hospital discharge between groups. As a secondary outcome, the risk of 30-day rehospitalization due to urinary tract infection was assessed.Results
Among the 321 cases included, 60 received inappropriate antimicrobial therapy. The median hospital lenght of stay was 2.64 days. The overall rehospitalization proportion was 13.7%. After IPTW adjustment, inappropriate therapy was not associated with longer time to hospital discharge (HR = 0.97; 95% CI 0.71-1.33) or with a higher risk of 30-day rehospitalization due to urinary tract infection (OR = 1.42; 95% CI 0.65-3.06).Conclusion
In patients hospitalized with community-acquired acute pyelonephritis, inappropriate empirical antimicrobial therapy was not associated with prolonged hospital stay or an increased risk of 30-day rehospitalization for urinary tract infection.
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BibTeX
@article{salinasmendoza2026effect,
title = {{Effect of inappropriate empirical antimicrobial therapy on time to hospital discharge in patients with community-acquired acute pyelonephritis: a propensity score-weighted retrospective cohort study.}},
author = {Sebastián Salinas-Mendoza and Álvaro Javier Burgos Cárdenas and Estivalis Geraldine Acosta Gutierrez and Sergio Velasco Malagon},
journal = {BMC infectious diseases},
year = {2026},
month = jul,
doi = {10.1186/s12879-026-14065-0},
url = {https://europepmc.org/article/MED/42894114},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Effect of inappropriate empirical antimicrobial therapy on time to hospital discharge in patients with community-acquired acute pyelonephritis: a propensity score-weighted retrospective cohort study.
AU - Sebastián Salinas-Mendoza
AU - Álvaro Javier Burgos Cárdenas
AU - Estivalis Geraldine Acosta Gutierrez
AU - Sergio Velasco Malagon
PY - 2026
DA - 2026/07/01
JO - BMC infectious diseases
DO - 10.1186/s12879-026-14065-0
UR - https://europepmc.org/article/MED/42894114
AB - Background Acute pyelonephritis is a common reason for emergency department admission. The increasing prevalence of resistant pathogens has raised concerns about the effectiveness of empirical therapy and has led to increased use of broad-spectrum antimicrobial therapy. This study aimed to evaluate the effect of inappropriate antimicrobial therapy on the clinical outcome of time to hospital discharge among patients with community-acquired acute pyelonephritis treated at a hospital in Cartagena, Colombia.Methods We conducted an analytical retrospective cohort study including adult patients admitted to the emergency department with a diagnosis of acute pyelonephritis who received empirical antimicrobial therapy at a hospital in Cartagena, Colombia, between January 2021 and August 2025. Inappropriate therapy was defined as resistance to the empirical antibiotic documented by urine culture. The primary objective was to compare time to hospital discharge between patients treated with appropriate antimicrobial therapy and those who received inappropriate therapy. A balanced pseudopopulation was created using inverse probability of treatment weighting (IPTW), and a Cox proportional hazards regression model was fitted to evaluate time to hospital discharge between groups. As a secondary outcome, the risk of 30-day rehospitalization due to urinary tract infection was assessed.Results Among the 321 cases included, 60 received inappropriate antimicrobial therapy. The median hospital lenght of stay was 2.64 days. The overall rehospitalization proportion was 13.7%. After IPTW adjustment, inappropriate therapy was not associated with longer time to hospital discharge (HR = 0.97; 95% CI 0.71-1.33) or with a higher risk of 30-day rehospitalization due to urinary tract infection (OR = 1.42; 95% CI 0.65-3.06).Conclusion In patients hospitalized with community-acquired acute pyelonephritis, inappropriate empirical antimicrobial therapy was not associated with prolonged hospital stay or an increased risk of 30-day rehospitalization for urinary tract infection.
SN - 1471-2334
ER -