Association of Mediterranean diet with Mild Cognitive Impairment and Alzheimer’s disease: A Systematic Review and Meta-Analysis
By Balwinder Singh, A. Parsaik, Michelle M. Mielke, P. Erwin, David S. Knopman, Ronald C. Petersen, R. Roberts. Journal of Alzheimer's Disease, 2014
609 citations recorded by the source corpus.
Background/Objective: To conduct a systematic review of all studies to determine whether there is an association between the Mediterranean diet (MeDi) and cognitive impairment. Methods: We conducted a comprehensive search of the major databases and hand-searched proceedings of major neurology, psychiatry, and dementia conferences through November 2012. Prospective cohort studies examining the MeDi with longitudinal follow-up of at least 1 year and reporting cognitive outcomes (mild cognitive impairment [MCI] or Alzheimer’s disease [AD]) were included. The effect size was estimated as hazard-ratio (HR) with 95% confidence intervals (CIs) using the random-effects model. Heterogeneity was assessed using Cochran’s Q-test and I2-statistic. Results: Out of the 664 studies screened, five studies met eligibility criteria. Higher adherence to the MeDi was associated with reduced risk of MCI and AD. The subjects in the highest MeDi tertile had 33% less risk (adjusted HR = 0.67; 95% CI, 0.55–0.81; p < 0.0001) of cognitive impairment (MCI or AD) as compared to the lowest MeDi score tertile. Among cognitively normal individuals, higher adherence to the MeDi was associated with a reduced risk of MCI (HR = 0.73; 95% CI, 0.56–0.96; p = 0.02) and AD (HR = 0.64; 95% CI, 0.46–0.89; p = 0.007). There was no significant heterogeneity in the analyses. Conclusions: While the overall number of studies is small, pooled results suggest that a higher adherence to the MeDi is associated with a reduced risk of developing MCI and AD, and a reduced risk of progressing from MCI to AD. Further prospective-cohort studies with longer follow-up and randomized controlled trials are warranted to consolidate the evidence. Systematic review registration number: PROSPERO 2013: CRD42013003868.
Subfields: Physiology, Public Health, Environmental and Occupational Health
View Paper: https://www.semanticscholar.org/paper/a5d05005385e4fb11d71cc74289e1e813cc0ddce
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Citations in the corpus
- Definitions and potential health benefits of the Mediterranean diet: views from experts around the world (2014, background): “Other benefits extensively researched include the prevention of type 2 diabetes [30,31] and metabolic syndrome [32], cognitive impairment [33-35], and unipolar depression [36,37].”