BACKGROUND: dementia and cognitive decline have been linked to cardiovascular risk. Alcohol has known negative effects in large quantities but may be protective for the cardiovascular system in smaller amounts. Effect of alcohol intake may be greater in the elderly and may impact on cognition. METHODS: to evaluate the evidence for any relationship between incident cognitive decline or dementia in the elderly and alcohol consumption, a systematic review and meta-analyses were carried out. Criteria for inclusion were longitudinal studies of subjects aged >or=65, with primary outcomes of incident dementia/cognitive decline. RESULTS: 23 studies were identified (20 epidemiological cohort, three retrospective matched case-control nested in a cohort). Meta-analyses suggest that small amounts of alcohol may be protective against dementia (random effects model, risk ratio [RR] 0.63; 95% CI 0.53-0.75) and Alzheimer's disease (RR 0.57; 0.44-0.74) but not for vascular dementia (RR 0.82; 0.50-1.35) or cognitive decline (RR 0.89; 0.67-1.17) However, studies varied, with differing lengths of follow up, measurement of alcohol intake, inclusion of true abstainers and assessment of potential confounders. CONCLUSIONS: because of the heterogeneity in the data these findings should be interpreted with caution. However, there is some evidence to suggest that limited alcohol intake in earlier adult life may be protective against incident dementia later.
BACKGROUND:dementia and cognitive decline have been linked to cardiovascular risk. Alcohol has known negative effects in large quantities but may be protective for the cardiovascular system in smaller amounts. Effect of alcohol intake may be greater in the elderly and may impact on cognition. METHODS: to evaluate the evidence for any relationship between incident cognitive decline or dementia in the elderly and alcohol consumption, a systematic review and meta-analyses were carried out. Criteria for inclusion were longitudinal studies of subjects aged >or=65, with primary outcomes of incident dementia/cognitive decline. RESULTS: 23 studies were identified (20 epidemiological cohort, three retrospective matched case-control nested in a cohort). Meta-analyses suggest that small amounts of alcohol may be protective against dementia (random effects model, risk ratio [RR] 0.63; 95% CI 0.53-0.75) and Alzheimer's disease (RR 0.57; 0.44-0.74) but not for vascular dementia (RR 0.82; 0.50-1.35) or cognitive decline (RR 0.89; 0.67-1.17) However, studies varied, with differing lengths of follow up, measurement of alcohol intake, inclusion of true abstainers and assessment of potential confounders. CONCLUSIONS: because of the heterogeneity in the data these findings should be interpreted with caution. However, there is some evidence to suggest that limited alcohol intake in earlier adult life may be protective against incident dementia later.
Authors: Michael A Collins; Edward J Neafsey; Kewei Wang; Nicholas J Achille; Robert M Mitchell; Sreevidya Sivaswamy Journal: Mol Neurobiol Date: 2010-04-28 Impact factor: 5.590
Authors: Jürgen Rehm; Dolly Baliunas; Guilherme L G Borges; Kathryn Graham; Hyacinth Irving; Tara Kehoe; Charles D Parry; Jayadeep Patra; Svetlana Popova; Vladimir Poznyak; Michael Roerecke; Robin Room; Andriy V Samokhvalov; Benjamin Taylor Journal: Addiction Date: 2010-03-15 Impact factor: 6.526
Authors: Maria C Norton; Jeffrey Dew; Heeyoung Smith; Elizabeth Fauth; Kathleen W Piercy; John C S Breitner; JoAnn Tschanz; Heidi Wengreen; Kathleen Welsh-Bohmer Journal: J Am Geriatr Soc Date: 2012-02-08 Impact factor: 5.562