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정상 노인과 경도인지장애의 감별을 위한 언어 기억과 시공간 기억 검사의 예측 성능 비교

Comparison of Predictive Performance between Verbal and Visuospatial Memory for Differentiating Normal Elderly from Mild Cognitive Impairment

  • 변해원 (호남대학교 보건과학대학 언어치료학과)
  • Byeon, Haewon (Department of Speech Language Pathology, Honam University)
  • 투고 : 2020.03.26
  • 심사 : 2020.06.20
  • 발행 : 2020.06.28

초록

이 연구는 첫째, 경도인지장애(MCI)가 언어 기억 및 시공간 기억 등 특정 기억의 저하와 관련이 있는지를 파악하고, 둘째, 정상 노인으로부터 MCI를 감별하는 데 예측력이 우수한 지표를 탐색하였다. 표준화 된 기억검사를 수행한 189명(정상 노인 103 명, MCI 86 명)을 분석하였다. 언어 기억은 Seoul Verbal Learning Test를 이용하였고. 시공간 기억은 Rey Complex Figure Test를 이용해서 측정하였다. 다항 로지스틱 회귀모형을 이용하여 기억 검사의 예측력을 분석한 결과, 언어 기억과 시공간 기억은 정상 노인으로부터 MCI를 감별하는 데 예측 성능이 유의미하였다. 반면, 각 기억 검사의 수행결과를 포함하여 모든 혼란변수를 보정했을 때, 언어 기억의 즉시 회상만 정상 노인으로부터 MCI를 감별하는 데 예측력이 유의미하였으며, 시공간 기억의 즉시 회상은 예측력이 유의미하지 않았다. 이 결과는 MCI를 선별할 때 언어 기억과 시공간 기억의 지연 회상, 언어 기억의 즉시 회상이 MCI의 기억능력을 감별할 수 있는 최상의 조합임을 시사한다.

This study examined whether Mild Cognitive Impairment (MCI) is related to the reduction of specific memory among linguistic memory and visuospatial memory, and to identify the most predictive index for discriminating MCI from normal elderly. The subjects were analyzed for 189 elderly (103 healthy elderly, 86 MCI). The verbal memory was used by the Seoul Verbal Learning Test. visuospatial memory was measured using the Rey Complex Figure Test. As a result of multiple logistic regression, verbal memory and visuospatial memory showed significant predictive performance in discriminating MCI from normal elderly. On the other hand, when all the confounding variables were corrected, including the results of each memory test, the predictive power was significant in distinguishing MCI from normal aging only in the immediate recall of verbal memory, and the predictive power was not significant in the immediate recall of visuospatial memory. This result suggests that delayed recall of visuospatial memory and immediate recall of verbal memory are the best combinations to discriminate memory ability of MCI.

키워드

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