Factors involved in time reduction between seizure relapses in patients with epilepsy attending emergency rooms in Medellín, Colombia

•Administrative issues in medication delivery increases speed between relapses.•There is shorter time between relapses in patients with psychiatric comorbidity.•Multiple seizure patterns are related to a higher relapse rate.•Higher seizure frequency decreases time between seizure relapse. Seizure relapses are the leading cause of admission to emergency rooms (ER) in people with epilepsy. To analyze administrative and clinical factors associated with the duration between seizure relapses in people with epilepsy admitted to the Neurological Institute of Colombia (Medellin) between July 2018 and July 2019. A retrospective follow-up study of 156 patients over 18 years old, diagnosed with epilepsy, and treated for over a year. The outcome variable was the time between seizure relapses, identified through the record of ER attendances. In addition, difficulties in the prescription filling process (delay, omission, or brand change) and clinical characteristics were analyzed as potential associated influence factors. The statistical analysis was performed using the Prentice, Williams & Peterson-Gap Time survival model for recurrent events. Finally, Adjusted Hazard Ratios (aHR) with 95% confidence intervals (95%CI) are also presented. One hundred fifty-six patients were analyzed. Their average age of diagnosis was 15.5 years (SD = 22.5), the median number of monthly seizures was 3 (SD = 9.3), and 50.6% were women. Moreover, difficulties in the prescription filling process were associated with a time reduction between seizure relapses (aHR = 2.61; 95%CI 1.49–4.57), showing a similar impact as having a history of three or four types of events (aHR = 2.96; 95%CI 1.23–7.12) and neuropsychiatric comorbidity (aHR = 1.89; 95%CI 1.04–3.54). Neuropsychiatric comorbidity, history of several types of events, and experiencing difficulties with prescription filling are associated with lower benefit from treatment to control seizure relapses.