전산화된 치매선별 검사(Computerized Dementia Screening Test: CDST)의 규준 연구
Normative Study on the Computerized Dementia Screening Test(CDST)
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초록
CDST는 치매선별검사로서 타당하고, 한국 노인들에게 적절한 검사이다. 본 연구에서 제시한 규준과 경계 점수는 피검자의 수행을 이해하고 진단하는데 도움이 되는 것으로 확인되었다. 본 검사는 한국 최초로 컴퓨터를 이용하여 치매 선별 검사를 새로 개발하였다는 의의를 지닌다. 이에 더해, 치매 선별을 보다 정교하게 하기 위해 단순한 총점이 아닌 치매 가능성 여부에 대한 해석까지 자동으로 제공된다. 이에 더해 본 연구의 결과들은 이후에 다양한 목적으로 개발될 수 있는 전산화된 신경심리검사 제작에 구체적인 정보를 제공해 줄 것으로 생각된다.
Abstract
This study purported to develop norms for the Computerized Dementia Screening Test (CDST) in elderly Korean population. In order to develop valid norms, effects of demographic variables on the test performance were examined as well as the validity of the test itself. Normative sample consisted of one hundred twenty elderly volunteers whose ages were between 55 and 84 living in Seoul, Kyungki-do, and Kwangju. Age and education proved to be significant factors influencing CDST performance, while gender and literacy proved to be of minimal importance. Correlation coefficient between the CDST and the K-DRS performance was .53 (p < .001). Logistic regression analysis with AD patients and normal participants matched for age and education produced superb sensitivity and specificity of 92%. A rank method was utilized to develop standardized scores that would provide cut-off scores which can be utilized to a wider range of elderly samples. These cut-off scores based on standardized scores yielded excellent sensitivity and specificity of 88%, which were superior to cut-off scores based on raw scores. A multi-component decision-making procedure introduced in this study used in conjunction with the standardized scores appear to be a more informative and valid approach for screening dementia.