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Systematic review of health behavioral risks and cognitive health in older adults.

Abstract

BACKGROUND

An increasing body of evidence suggests that health behaviors may protect against cognitive impairment and dementia. The purpose of this study was to summarize the current evidence on health behavioral factors predicting cognitive health through a systematic review of the published literature.

METHODS

PubMed, Embase, and PsycINFO databases were searched for studies on community representative samples aged 65 and older, with prospective cohort design and multivariate analysis. The outcome--cognitive health--was defined as a continuum of cognitive function ranging from cognitive decline to impairment and dementia, and health behaviors included physical activity, smoking, alcohol drinking, body mass index, and diet and nutrition.

RESULTS

Of 12,105 abstracts identified, 690 relevant full-texts were reviewed. The final yield amounted to 115 articles of which 37 studies were chosen that met the highest standards of quality. Leisure time physical activity, even of moderate level, showed protective effects against dementia, whereas smoking elevated the risk of Alzheimer's disease. Moderate alcohol consumption tended to be protective against cognitive decline and dementia, but nondrinkers and frequent drinkers exhibited a higher risk for dementia and cognitive impairment. Midlife obesity had an adverse effect on cognitive function in later life. Analysis showed vegetable and fish consumption to be of benefit, whereas, persons consuming a diet high in saturated fat had an increased dementia risk.

CONCLUSION

The review demonstrates accumulating evidence supporting health behavioral effects in reducing the risk of cognitive decline and dementia. Results indicate potential benefits of healthy lifestyles in protecting cognitive health in later life.

Links

  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Suwon, Republic of Korea. yhlee@ajou.ac.kr

    , , , , , ,

    Source

    International psychogeriatrics 22:2 2010 Mar pg 174-87

    MeSH

    Aged
    Aged, 80 and over
    Alcohol Drinking
    Alzheimer Disease
    Body Mass Index
    Cognition Disorders
    Dementia
    Diet
    Exercise
    Female
    Health Behavior
    Humans
    Leisure Activities
    Male
    Middle Aged
    Nutritional Status
    Obesity
    Risk Factors
    Smoking

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    19883522

    Citation

    Lee, Yunhwan, et al. "Systematic Review of Health Behavioral Risks and Cognitive Health in Older Adults." International Psychogeriatrics, vol. 22, no. 2, 2010, pp. 174-87.
    Lee Y, Back JH, Kim J, et al. Systematic review of health behavioral risks and cognitive health in older adults. Int Psychogeriatr. 2010;22(2):174-87.
    Lee, Y., Back, J. H., Kim, J., Kim, S. H., Na, D. L., Cheong, H. K., ... Kim, Y. G. (2010). Systematic review of health behavioral risks and cognitive health in older adults. International Psychogeriatrics, 22(2), pp. 174-87. doi:10.1017/S1041610209991189.
    Lee Y, et al. Systematic Review of Health Behavioral Risks and Cognitive Health in Older Adults. Int Psychogeriatr. 2010;22(2):174-87. PubMed PMID: 19883522.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Systematic review of health behavioral risks and cognitive health in older adults. AU - Lee,Yunhwan, AU - Back,Joung Hwan, AU - Kim,Jinhee, AU - Kim,Si-Heon, AU - Na,Duk L, AU - Cheong,Hae-Kwan, AU - Hong,Chang Hyung, AU - Kim,Youn Gu, Y1 - 2009/11/03/ PY - 2009/11/4/entrez PY - 2009/11/4/pubmed PY - 2010/4/13/medline SP - 174 EP - 87 JF - International psychogeriatrics JO - Int Psychogeriatr VL - 22 IS - 2 N2 - BACKGROUND: An increasing body of evidence suggests that health behaviors may protect against cognitive impairment and dementia. The purpose of this study was to summarize the current evidence on health behavioral factors predicting cognitive health through a systematic review of the published literature. METHODS: PubMed, Embase, and PsycINFO databases were searched for studies on community representative samples aged 65 and older, with prospective cohort design and multivariate analysis. The outcome--cognitive health--was defined as a continuum of cognitive function ranging from cognitive decline to impairment and dementia, and health behaviors included physical activity, smoking, alcohol drinking, body mass index, and diet and nutrition. RESULTS: Of 12,105 abstracts identified, 690 relevant full-texts were reviewed. The final yield amounted to 115 articles of which 37 studies were chosen that met the highest standards of quality. Leisure time physical activity, even of moderate level, showed protective effects against dementia, whereas smoking elevated the risk of Alzheimer's disease. Moderate alcohol consumption tended to be protective against cognitive decline and dementia, but nondrinkers and frequent drinkers exhibited a higher risk for dementia and cognitive impairment. Midlife obesity had an adverse effect on cognitive function in later life. Analysis showed vegetable and fish consumption to be of benefit, whereas, persons consuming a diet high in saturated fat had an increased dementia risk. CONCLUSION: The review demonstrates accumulating evidence supporting health behavioral effects in reducing the risk of cognitive decline and dementia. Results indicate potential benefits of healthy lifestyles in protecting cognitive health in later life. SN - 1741-203X UR - https://www.unboundmedicine.com/medline/citation/19883522/Systematic_review_of_health_behavioral_risks_and_cognitive_health_in_older_adults_ L2 - https://www.cambridge.org/core/product/identifier/S1041610209991189/type/journal_article DB - PRIME DP - Unbound Medicine ER -