Factors associated with discharge and return visits of emergency department patients with a sepsis best practice alert

Background Best practice alerts (BPAs) used in emergency departments (EDs) to identify patients with possible sepsis lack specificity and some ED patients with sepsis BPAs are discharged. We evaluated factors associated with ED discharge following a sepsis BPA and with subsequent 7-day return admissions with sepsis or infection. Methods We conducted a retrospective cohort study using an electronic health record data query from five hospitals (2022-2024). Using logistic regression, we evaluated the association of participant demographics and clinical characteristics with ED discharge and factors at the initial ED visit associated with return admission. Results Among 62,068 ED visits with a sepsis BPA, one third resulted in ED discharge. Discharged participants were younger and more often female, Black, multiracial, and/or Hispanic; they more often had an initially normal pulse, respiratory rate, blood pressure, and lactic acid than admitted participants. Discharged participants more often had a fever on arrival (adjusted odds ratio (aOR) 6.03; p<0.001) and a white blood cell (WBC) count 11,000-14,999 (aOR 4.57; p<0.001) or 15,000-19,999/uL (aOR 2.01; p<0.001). One percent of discharged participants experienced a 7-day return admission with a diagnosis of sepsis or infection, which was associated with older age, White or Asian race, diastolic hypotension, WBC count [&le;]15,000/uL or <4,000/uL, and an index visit BPA response indicating sepsis or non-response. Conclusions Return admissions among discharged ED patients with a sepsis BPA are rare. Several factors are associated both with hospital admission at the index visit and return admission, indicating a need for additional risk-stratification tools.