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Objective: To assess the validity and reliability of the QOLIE-31-Thai Version.
Material and Method: The original questionnaire of the QOLIE-31 was first translated into Thai and, then, item comprehension was assessed. Back translation into English and cross-cultural modification were conducted. Its reliability was assessed using a sample of consenting epileptics aged 18-65 years visiting community hospitals in Nakhon Ratchasima Province, Thailand.
Results: One hundred and sixty one epileptics completed the questionnaire. The internal consistency of each scale of the QOLIE-31 was above the accepted standard of 0.7, except for Cognitive Functioning, Medication Effect and Social Functioning.
Conclusion: The QOLIE-31-Thai Version is reliable for use in Thai rural epileptics even for low educated epileptics but interviews might have to be used instead.
Keywords: Epilepsy, Quality of life, Reliability, Validity, Thailand