Development of Dementia Screening Test for Thai Elderly

  • Thitiphan Thaneerat Nakhonsawan Rajanagarindra Psychiatric Hospital, Nakhonsawan
  • Uboonrat Tooreerach Suansaranrom Psychiatric Hospital, Suratthani
  • Boonlue Petrugs Mental Health Center 11, Suratthani
  • Piyanoot Kimsao Suansaranrom Psychiatric Hospital, Suratthani
  • Kwanchanok Hongchukiet Suansaranrom Psychiatric Hospital, Suratthani
  • Boontham Deeduang Mental Health Center 11, Suratthani
Keywords: geriatric, neurocognitive disorders, dementia, screening test, Thailand

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.

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How to Cite
Thaneerat, T., Tooreerach, U., Petrugs, B., Kimsao, P., Hongchukiet, K., & Deeduang, B. (1). 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