Urinary Tract Infection


The association between length of stay and readmission for patients diagnosed with urinary tract infection (UTI) in the emergency department (ED)


The aim of this study is to investigate the association between length of stay and readmission for patients diagnosed with UTI in the ED.


A retrospective cohort study. 


ED, Aarhus University Hospital.


All adults >18 years with UTI as the primary diagnosis, hospitalized in ED from 1st of july 2016-30th of june 2017.


The exposure in this study is length of stay for patients with UTI hospitalized in the ED. Length of stay is calculated from the start of hospitalization to the time of discharge from the hospital.


The primary outcome is readmission for patient discharged with UTI from the ED. Data on readmission is available from the BI-portal in the Central Denmark Region. Readmission is considered when a patient diagnosed with UTI as the primary diagnosis is readmitted within 30 days of discharge.


Studies show that patients are discharged from the ED before the results of their urine cultures are available. This occasionally results in patients being discharged with ineffective antibiotic treatment; thus, increasing the risk of readmission. This study is based on the hypothesis that the shorter length of stay in the hospital, the higher risk of readmission. In future, the study can contribute with new knowledge on length of stay and the association with readmission. In addition, it can be used for rethinking a strategy of treatment for patients with UTI, and possibly develop a new guideline that incorporates a follow-up after discharge.


ED, Aarhus University Hospital.