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The purpose of this paper is to investigate the prevalence and factors related to cognitive impairment among hill-tribe older people in Chiang Rai province, Thailand.

A cross-sectional study was carried out amongst 459 hill-tribe older people aged 60 years and above. A Mini Mental State Examination (MMSE) Thai 2002 version was used for cognitive screening. A questionnaire and medical records were used for demographic and clinical data collection while descriptive statistics were used to analyze characteristic data. Potential factors related to cognitive impairment were analyzed by using univariate logistic regression analysis.

The prevalence of cognitive impairment amongst the participants was 49.89 percent (95% CI 45.32%, 53.47 percent). Factors related to cognitive decline included no occupation (OR=1.49, 95% CI 1.10–2.03, p<0.04) and a history of amphetamine use (OR=1.57, 95% CI 1.09–2.33, p<0.04).

Cognitive decline should be a cause for concern amongst Thai hill-tribe older people, especially amongst those in the group with a history of amphetamine use. However, Thai health care professionals need to be aware of the potential cultural bias in the MMSE Thai 2002 version as a cognition test targeted at the hill-tribe population as the questionnaire may not provide a true reflection of their cultural experience and background.