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A population-based post mortem study of sudden unexpected death in epilepsy
1Neurosciences Unit, Mater Children's Hospital, Brisbane, QLD, Australia; Department of Neurology, Women's and Children's Hospital, Adelaide, SA, Australia.
Summary
Sudden Unexpected Death in Epilepsy (SUDEP) incidence in Queensland was 0.7 per 1000 person-years. Key factors included unwitnessed overnight seizures, male sex, and low anticonvulsant levels, with complete autopsies performed in only 59% of cases.
Area of Science:
- Neurology
- Forensic Pathology
- Epidemiology
Background:
- Epilepsy-related deaths (ERD) represent a significant public health concern.
- Sudden Unexpected Death in Epilepsy (SUDEP) is a leading cause of mortality in individuals with epilepsy.
- Understanding the incidence and contributing factors to SUDEP is crucial for prevention strategies.
Purpose of the Study:
- To determine the incidence of autopsy-confirmed SUDEP in Queensland, Australia.
- To identify demographic and clinical factors associated with SUDEP.
- To assess the completeness of autopsy examinations for SUDEP cases.
Main Methods:
- Electronic search of autopsy reports in Queensland for 'epilepsy' or 'seizure' over a 5-year period.
- Review of identified epilepsy-related deaths (ERD) to extract data on SUDEP.
- Calculation of SUDEP incidence using Queensland epilepsy prevalence data.
Main Results:
- 175 ERD identified, including 123 SUDEP cases.
- Autopsy-confirmed SUDEP incidence was 0.7 per 1000 person-years.
- Associated factors included male sex, subtherapeutic anticonvulsant levels (55%), unwitnessed overnight seizures (87%), prone position (74%), and proximate seizure signs (60%).
- Complete autopsies were performed in 59% of cases, primarily in urban areas.
Conclusions:
- This study establishes the incidence of SUDEP in Queensland and highlights critical associated factors.
- Unwitnessed overnight seizures, particularly in the prone position, appear to be a significant factor in SUDEP.
- Inconsistent autopsy completeness, especially in non-urban areas, may impact accurate SUDEP determination.
