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Journal of the Korean Geriatrics Society 2005;9(3):210-214.
Published online September 30, 2005.
Pattern of Cognitive Decline with Age in the Elderly
Jonghan Park
Department of Psychiatry, Catholic University of Daegu School of Medicine, Daegu, Korea. jpark@cu.ac.kr
연령 증가에 따른 노인 인지기능의 감퇴 양상
Abstract
OBJECTIVE: Examination of the changing pattern of cognitive function in old age. METHOD: Cross-sectional observation of MMSEK performances of the elderly living in a rural community. The mean and standard deviation, coefficient of variability, and 95% confidence interval and difference between the upper and lower limits by the 5-year age interval were employed as indicators of the change.
RESULTS
Characteristics of the change of the MMSEK score by age were (1) overall decline and (2) widening of variance in terms of the standard deviation, coefficient of variability and difference between upper and lower limits of the 95% confidence interval.
CONCLUSION
The changing pattern of cognitive function with age in the elderly is decline with 'fan-spread' shape. Heterogeneity, genetic effect on cognitive function in the old age, cerebral reserve gained before the old age, and different extent of physical activities might suggest some explanation for the phenomena.
Key Words: Aged, Cognition, Dementia, Educatio
초 록

배경: 연령이 증가하면서 감퇴하는 인지기능의 감퇴 특성을 파악하기 위한 연구이다.

방법: 경상북도 포항시 죽장면에 거주하는 노인 702명의 한국판 간이정신상태검사(MMSEK) 성적을 5세 간격으로 구분하여 각 연령대의 산술평균과 표준편차, 변이 계수, 그리고 95% 신뢰구간의 상한치와 하한치 및 그 차이를 조사하였다.

결과: ① MMSEK 성적은 연령이 증가할수록 점차 감소했다. ② 각 연령대 별 MMSEK의 변이 계수는 연령이 증가하면서 커졌다. ③ 각 연령대 별 MMSEK 성적의 95% 신뢰구간의 폭은 연령이 증가하면서 커졌다.

결론: 위의 결과를 종합하면, 노인들에서는 연령이 증가하면서 인지기능은 서서히 감퇴하되, 그 양상은 부챗살 모양이다.



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