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Journal of the Korean Geriatrics Society 2005;9(3):196-202.
Published online September 30, 2005.
Validity of the Korean Version of Informant Questionnaire on the Cognitive Decline in the Elderly(IQCODE)
Dong Woo Lee, Jun Young Lee, Seong Gon Ryu, Seong Jin Cho, Chang Hyung Hong, Jung Ho Lee, Young Min Choi, Bong Seog Kim, Eun Jin Park, Sang Hoon Park
한국어판 Informant Questionnaire on Cognitive Decline in the Elderly(IQCODE)의 타당도
Abstract
BACKGROUND
This study was conducted to prove the validity of the Korean version of the Informant Questionnaire on Cognitive Decline in the Elderly(IQCODE-K) as a screening test for Alzheimer's disease. METHOD: Informants of the elderly who visited the dementia clinic and the elderly living in community, were asked to complete IQCODE-K. Based on the final clinical diagnoses, performance of the the IQCODE-K in screening Alzheimer's disease was evaluated RESULTS: The IQCODE is showed high internal consistency and test-retesr reliability. Optimal cut-off score of IQCODE-K was 3.6, and the sensitivity and specificity at that score were 0.90 and 0.79.
CONCLUSION
IQCODE-K is probably very useful to screen Alzheimer's disease. It may be also useful for the less well-educated people.
Key Words: Alzheimer's disease, IQCODE, MMSE
초 록

연구배경: 본 연구의 목적은 정보 제공자의 평가에 의해 수행되는 치매 선별 도구인 Informant Questionnaire on Cognitive Decline in the Elderly 의 한국어판(이하 IQCODE-K)을 개발하고, 그 타당도를 평가하는데 있다.

방법: 먼저 IQCODE를 한국어판으로 번안하고, 이를 병원 정신과 외래를 방문한 노인 환자의 보호자들과 지역사회 거주노인의 보호자들에게 작성하게 한 후 알쯔하이머형 치매의 진단을 내림으로써 IQCODE의 민감도, 특이도를 구하고 타당도검사-재검사 신뢰도를 평가하였다.

결과: IQCODE-K는 높은 내적 일치도를 보였고, IQCODE-K 점수 3.6점을 절단점으로 하였을 때 민감도는 90%였고, 특이도는 79%였다.

결론: 본 연구의 결과로 IQCODE-K의 치매 선별 도구로서의 타당도가 입증되었으며, 절단점으로는 3.6점이 적합하다는 결과를 얻었다.

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