Emergency department and inpatient interhospital transfers for patients with status epilepticus.

Objective: Interhospital transfers for status epilepticus (SE) are common, and some are avoidable and likely lower yield. The use of interhospital transfer may differ in emergency department (ED) and inpatient settings, which contend with differing clinical resources and financial incentives. However, transfer from these two settings is understudied, leaving gaps in our ability to improve the hospital experience, cost, and triage for this neurologic emergency. We aimed to describe interhospital transfer for SE and examine the relationship between the site of transfer and hospital length of stay.

Methods: We performed a cross-sectional study of adult patients with SE who underwent interhospital transfer using data from the State Emergency Department Databases and State Inpatient Databases of Florida (2016-2019) and New York (2018-2019). The primary outcome was discharge after undergoing transfer. Secondary outcomes were discharge within 1 day, discharge after 30 days, receipt of electroencephalography (EEG), and discharge disposition.

Results: There were 10 461 encounters for SE. Of 1790 ED encounters without admission to the same hospital, 324 (18.1%) resulted in transfer. Of 8671 hospitalizations, 629 (7.3%) resulted in transfer. Patients transferred from the ED were younger, more likely were White, more likely were in a metro area, and had fewer medical comorbidities than patients transferred from the inpatient setting. The median time to discharge was 5 days (interquartile range [IQR] = 2.0-9.0) after ED transfer and 10 days (IQR = 4.0-20.0) after inpatient transfer. There were 58 (17.9%) patients who were discharged within 1 day after undergoing transfer from an ED. ED transfers had higher rates of discharge at 30 days and higher likelihood of undergoing EEG at the receiving hospital and being discharged home.

Significance: A high proportion of patients with SE are discharged shortly after undergoing interhospital transfer, particularly those transferred from the ED. Understanding reasons for transfer is a crucial next step in triaging limited inpatient epilepsy resources and reducing costs associated with interhospital transfer.