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Chronic distress and incidence of mild cognitive impairment.
Neurology 2007; 68(24):2085-92Neur

Abstract

OBJECTIVE

Mild cognitive impairment (MCI) is associated with increased morbidity and mortality but its development is not well understood. Here we test the hypothesis that chronic psychological distress is associated with increased incidence of MCI in old age.

METHODS

Participants are older persons from two cohort studies with uniform annual clinical evaluations which included detailed cognitive testing and clinical classification of MCI. We excluded persons with dementia or MCI at baseline; follow-up data were available on 1,256 persons without cognitive impairment (95% of those eligible). At baseline, they completed a six-item measure of neuroticism (mean = 15.6, SD = 6.6), an indicator of the tendency to experience psychological distress.

RESULTS

During up to 12 years of follow-up, 482 persons (38%) developed MCI. Risk of MCI increased by about 2% for each one unit increase on the distress scale (relative risk [RR] = 1.02; 95% CI: 1.01, 1.04), with the association slightly stronger in men than women. Overall, a distress-prone person (score = 24, 90th percentile) was about 40% more likely to develop MCI than someone not prone to distress (score = 8, 10th percentile). Adjustment for depressive symptomatology at baseline did not substantially change results (RR = 1.02; 95% CI: 1.00, 1.03). Depressive symptoms were also related to risk of MCI but not after controlling for distress score. In mixed-effects models, higher distress score was associated with lower level of function in multiple cognitive domains at baseline and more rapid cognitive decline, especially in episodic memory.

CONCLUSION

Among older persons without manifest cognitive impairment, higher level of chronic psychological distress is associated with increased incidence of mild cognitive impairment.

Authors+Show Affiliations

Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL 60612, USA. rwilson@rush.edu

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17562829

Citation

Wilson, R S., et al. "Chronic Distress and Incidence of Mild Cognitive Impairment." Neurology, vol. 68, no. 24, 2007, pp. 2085-92.
Wilson RS, Schneider JA, Boyle PA, et al. Chronic distress and incidence of mild cognitive impairment. Neurology. 2007;68(24):2085-92.
Wilson, R. S., Schneider, J. A., Boyle, P. A., Arnold, S. E., Tang, Y., & Bennett, D. A. (2007). Chronic distress and incidence of mild cognitive impairment. Neurology, 68(24), pp. 2085-92.
Wilson RS, et al. Chronic Distress and Incidence of Mild Cognitive Impairment. Neurology. 2007 Jun 12;68(24):2085-92. PubMed PMID: 17562829.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chronic distress and incidence of mild cognitive impairment. AU - Wilson,R S, AU - Schneider,J A, AU - Boyle,P A, AU - Arnold,S E, AU - Tang,Y, AU - Bennett,D A, PY - 2007/6/15/pubmed PY - 2007/7/13/medline PY - 2007/6/15/entrez SP - 2085 EP - 92 JF - Neurology JO - Neurology VL - 68 IS - 24 N2 - OBJECTIVE: Mild cognitive impairment (MCI) is associated with increased morbidity and mortality but its development is not well understood. Here we test the hypothesis that chronic psychological distress is associated with increased incidence of MCI in old age. METHODS: Participants are older persons from two cohort studies with uniform annual clinical evaluations which included detailed cognitive testing and clinical classification of MCI. We excluded persons with dementia or MCI at baseline; follow-up data were available on 1,256 persons without cognitive impairment (95% of those eligible). At baseline, they completed a six-item measure of neuroticism (mean = 15.6, SD = 6.6), an indicator of the tendency to experience psychological distress. RESULTS: During up to 12 years of follow-up, 482 persons (38%) developed MCI. Risk of MCI increased by about 2% for each one unit increase on the distress scale (relative risk [RR] = 1.02; 95% CI: 1.01, 1.04), with the association slightly stronger in men than women. Overall, a distress-prone person (score = 24, 90th percentile) was about 40% more likely to develop MCI than someone not prone to distress (score = 8, 10th percentile). Adjustment for depressive symptomatology at baseline did not substantially change results (RR = 1.02; 95% CI: 1.00, 1.03). Depressive symptoms were also related to risk of MCI but not after controlling for distress score. In mixed-effects models, higher distress score was associated with lower level of function in multiple cognitive domains at baseline and more rapid cognitive decline, especially in episodic memory. CONCLUSION: Among older persons without manifest cognitive impairment, higher level of chronic psychological distress is associated with increased incidence of mild cognitive impairment. SN - 1526-632X UR - https://www.unboundmedicine.com/medline/citation/17562829/Chronic_distress_and_incidence_of_mild_cognitive_impairment_ L2 - http://www.neurology.org/cgi/pmidlookup?view=long&pmid=17562829 DB - PRIME DP - Unbound Medicine ER -