Methodologic issues in assessing risk factors for epilepsy in an epidemiologic study in India

Area of Science:

• Epidemiology
• Neurology
• Public Health

Background:

• Epilepsy prevention and intervention strategies require robust case-control studies.
• Developing countries face logistical and cultural challenges in conducting such research.
• Emerging research suggests nutritional and infective risk factors for epilepsy, differing from Western findings.

Purpose of the Study:

• To evaluate a field questionnaire for identifying epilepsy risk factors in rural India.
• To assess the feasibility of collecting data on known and potential epilepsy risk factors.

Main Methods:

• A structured questionnaire was administered to parents of children with epilepsy and control subjects in rural West Bengal.
• Data from 61 children with epilepsy and 59 controls were analyzed using multiple logistic regression.
• Odds Ratios (ORs) with 95% Confidence Intervals (CIs) were calculated to determine risk factor associations.

Main Results:

• Febrile convulsions emerged as an independent risk factor for epilepsy (OR 6.45; 95% CI, 1.45 to 28.66).
• Socioeconomic status, reproductive history, and some infection markers proved unreliable for assessment.
• Associations between epilepsy and family history or infective symptoms were suggested but not definitively proven.

Conclusions:

• The study confirmed known epilepsy risk factors and suggested novel associations.
• A retrospective questionnaire is limited in accurately assessing infective exposures.
• Further research with increased statistical power is necessary to explore weaker associations and interaction effects in epilepsy.