Development of Dementia Screening Test for Thai Elderly
Main Article Content
Abstract
Objective : To develop and test the validity and reliability of Dementia Screening Test (DST) operated by non-medical personnel.
Method : A tool development and psychometric property testing study design was conducted between February-October 2015, which was divided into 3 phases. Phase 1 was expert panel
meeting to aggregate items for DST. Phase 2 was the study of content validity and try out the DST. Phase 3 was the study of the psychometric property of the DST compared with diagnosis
by psychiatrist (based on DSM-5 criteria) in diagnostic test study design. The 400 samples were recruited by systematic sampling from all 7 provinces of health region 11, Thailand. Participants
must complete the demographic and health questionnaires, DST, TMSE, and MoCA test.
Results : Most of the samples were female (64.5%) with mean age of 69.5 years. Sixty-nine percent of the samples were graduated grade 4 or lower. Most of the participants had no
direct income (34.5%) with the whole family income less than 5,000 THB/month. Dementia Screening Test (DST) had 3 items (8 points) and the average duration participants used for
DST in this study was 3 minutes and 58 seconds. The content validity index and Cronbach’s alpha coefficient were 0.89 and 0.78, respectively. The agreement with clinical diagnosis by
psychiatrist was 0.56. Cut-off point of 5 showed area under ROC curve of 0.87. The sensitivity and specificity of DST were 83.1% and 77.9%, respectively. The accuracy of the DST was
79.5%, while positive predictive value (PPV) and negative predictive value (NPV) were 62.8% and 91.1%, respectively. Anymore, the positive likelihood ratio was 3.77.
Conclusion : The DST has both good reliability and validity. It is useful for dementia screening in the health system for Thai geriatric population.
Method : A tool development and psychometric property testing study design was conducted between February-October 2015, which was divided into 3 phases. Phase 1 was expert panel
meeting to aggregate items for DST. Phase 2 was the study of content validity and try out the DST. Phase 3 was the study of the psychometric property of the DST compared with diagnosis
by psychiatrist (based on DSM-5 criteria) in diagnostic test study design. The 400 samples were recruited by systematic sampling from all 7 provinces of health region 11, Thailand. Participants
must complete the demographic and health questionnaires, DST, TMSE, and MoCA test.
Results : Most of the samples were female (64.5%) with mean age of 69.5 years. Sixty-nine percent of the samples were graduated grade 4 or lower. Most of the participants had no
direct income (34.5%) with the whole family income less than 5,000 THB/month. Dementia Screening Test (DST) had 3 items (8 points) and the average duration participants used for
DST in this study was 3 minutes and 58 seconds. The content validity index and Cronbach’s alpha coefficient were 0.89 and 0.78, respectively. The agreement with clinical diagnosis by
psychiatrist was 0.56. Cut-off point of 5 showed area under ROC curve of 0.87. The sensitivity and specificity of DST were 83.1% and 77.9%, respectively. The accuracy of the DST was
79.5%, while positive predictive value (PPV) and negative predictive value (NPV) were 62.8% and 91.1%, respectively. Anymore, the positive likelihood ratio was 3.77.
Conclusion : The DST has both good reliability and validity. It is useful for dementia screening in the health system for Thai geriatric population.
Article Details
How to Cite
Thaneerat, T., Tooreerach, U., Petrugs, B., Kimsao, P., Hongchukiet, K., & Deeduang, B. (2017). Development of Dementia Screening Test for Thai Elderly. Journal of the Psychiatric Association of Thailand, 62(2), 177–186. Retrieved from https://he01.tci-thaijo.org/index.php/JPAT/article/view/92336
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Original Articles
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