Objectives: To explore association of variables influencing MMSE-Thai version (MMSE-T) score among Thai subjects.
Material and Method: 365 general non dementia Thai subjects of age 45-87 years were randomly recruited in Bangkok. All subjects were screened with MMSE-T and interviewed. Demographic factors that might affect the score of MMSE-T were collected. Relationship between demographic variables and MMSE-T score were evaluated.
Results: Of 365 subjects, mean MMSE-T score was 27.2 and ranged 17 - 30. There were 27 cases (7.44%) with MMSE-T score < 23. Subjects who had a score <23, were 18 cases (27.69%) and 9 cases (3.01%) in education level less than bachelor degree and at least bachelor degree respectively (p value <0.001). By linear regression analysis, the factors significantly affected the lower score were age higher than 60 years (p=0.017) and education below bachelor degree (p<0.001).
Conclusion: Factors including elderly and low education were negatively influenced on MMSE-T performance among Thai subjects.

Keywords: MMSE, Thai version, MMSE-T, Education