Prevalence of epilepsy--an unknown quantity

Area of Science:

• Neurology
• Global Health
• Epidemiology

Background:

• Epilepsy incidence, prevalence, and mortality rates exhibit significant variation across countries with differing economic statuses.
• These disparities are attributed to methodological challenges, premature mortality, seizure remission rates, socioeconomic determinants, and the impact of stigma.
• Diagnostic misclassification, including acute symptomatic or isolated unprovoked seizures, alongside biases related to population demographics and study design, contributes to observed differences.

Purpose of the Study:

• To analyze the factors contributing to the variation in epilepsy incidence, prevalence, and mortality across different economic contexts.
• To investigate the role of socioeconomic factors, diagnostic accuracy, and treatment access in global epilepsy outcomes.
• To identify potential strategies for mitigating epilepsy-related mortality, particularly in low-income settings.

Main Methods:

• Review of existing literature on epilepsy epidemiology across countries with varying economic levels.
• Analysis of factors such as diagnostic criteria, ascertainment methods, and socioeconomic status in shaping epilepsy statistics.
• Examination of premature mortality causes and seizure remission patterns in relation to economic development.

Main Results:

• Low-income countries (LICs) face higher premature mortality due to factors like treatment gaps, brain infections, and traumatic brain injuries.
• Lack of adherence to antiepileptic drugs in impoverished communities correlates with increased mortality and adverse events.
• Epilepsy can be self-remitting in up to 50% of cases, but stigma in LICs may lead to underascertainment of remission cases.
• Poverty is a significant risk factor for epilepsy development, incidence, prevalence, and mortality, both in LICs and among low-income populations in high-income countries (HICs).

Conclusions:

• Socioeconomic factors, particularly poverty, play a crucial role in the varying burden and mortality associated with epilepsy globally.
• Addressing the treatment gap, improving diagnostic practices, and mitigating stigma are essential for reducing epilepsy-related mortality, especially in LICs.
• Poverty represents a preventable cause of mortality in epilepsy that requires targeted interventions in both LICs and HICs.