Background:There have been no previous studies about comorbidities among adult people with epilepsy in Thailand.

Objective:To identifythemost common comorbid condition among adult people with epilepsy in Thailand.

Materials and methods: This study retrospectively explored Thai national data for reimbursements related to comorbidities among epileptic patients 18 years of age or older who were admitted for care between the fiscal years 2004-2012. People with epilepsy were searched for and identified using the ICD-10 code (G40) from the national database maintained by the Universal Health Coverage Insurance Office. Comorbid diseases were explored among eligible patients.

Result: Among the 139,867 adult people with epilepsy found, the top five most common comorbid conditions were hypertensive disease (10%), diabetes mellitus (4.6%), traumatic brain injury (2.8%), stroke (2.3%), and psychosis (1.9%).

Conclusion: Hypertension was the most common comorbid condition among adult people with epilepsy in Thailand. Therefore, outside of previous attention on neurologic or psychiatric comorbid conditions, this study provides new and interesting information concerning comorbidities in epilepsy and useful data for planning care of people with epilepsy in the future.

Keywords: Comorbidity, Adult people with epilepsy, Thailand