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Characteristics of neurocognitive functions in mild cognitive impairment with depression

Published online by Cambridge University Press:  10 March 2016

Hyun-Seok Dong
Affiliation:
Department of Psychiatry, Korea University Ansan Hospital, Ansan, South Korea
Changsu Han*
Affiliation:
Department of Psychiatry, Korea University Ansan Hospital, Ansan, South Korea
Sang Won Jeon
Affiliation:
Department of Psychiatry, Korea University Ansan Hospital, Ansan, South Korea
Seoyoung Yoon
Affiliation:
Department of Psychiatry, Korea University Ansan Hospital, Ansan, South Korea
Hyun-Ghang Jeong
Affiliation:
Department of Psychiatry, Korea University Guro Hospital, Seoul, South Korea
Yu Jeong Huh
Affiliation:
Department of Psychiatry, Korea University Ansan Hospital, Ansan, South Korea
Chi-Un Pae
Affiliation:
Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, South Korea
Ashwin A. Patkar
Affiliation:
Department of Psychiatry and Behavioural Sciences, Duke University Medical Center, Durham, North Carolina, USA
David C. Steffens
Affiliation:
Department of Psychiatry, University of Connecticut Health Center, Farmington, CT, USA
*
Correspondence should be addressed to: Changsu Han, MD, PhD, MHS Department of Psychiatry, Korea University Ansan Hospital, 516, Gojan-dong, Danwon-gu, Ansan-shi, Gyeonggi-do 425–707, South Korea. Phone: +82-31-412-5140; Fax: +82-2-6442-5008. Email: hancs@korea.ac.kr.

Abstract

Background:

Previous studies suggest that there is a strong association between depression and cognitive decline, and that concurrent depressive symptoms in MCI patients could contribute to a difference in neurocognitive characteristics compared to MCI patients without depression. The authors tried to compare neurocognitive functions between MCI patients with and without depression by analyzing the results of neuropsychological tests.

Methods:

Participants included 153 MCI patients. Based on the diagnosis of major depressive disorder, the participants were divided into two groups: depressed MCI (MCI/D+) versus non-depressed MCI (MCI/D−). The general cognitive and functional statuses of participants were evaluated. And a subset of various neuropsychological tests was presented to participants. Demographic and clinical data were analyzed using Student t-test or χ2 test.

Results:

A total of 153 participants were divided into two groups: 94 MCI/D+ patients and 59 MCI/D− patients. Age, sex, and years of education were not significantly different between the two groups. There were no significant differences in general cognitive status between MCI/D+ and MCI/D− patients, but MCI/D+ participants showed significantly reduced performance in the six subtests (Contrasting Program, Go-no-go task, Fist-edge-palm task, Constructional Praxis, Memory Recall, TMT-A) compared with MCI/D− patients.

Conclusions:

There were significantly greater deficits in neurocognitive functions including verbal memory, executive function, attention/processing speed, and visual memory in MCI/D+ participants compared to MCI/D−. Once the biological mechanism is identified, distinct approaches in treatment or prevention will be determined.

Type
Research Article
Copyright
Copyright © International Psychogeriatric Association 2016 

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