Epidemiological studies directly investigating the association between different types of meat intake and cognitive impairment are limited. We, therefore, examined this association in the Singapore Chinese Health Study.
In total, 16,948 participants were included in analysis. Diet was measured by a 165-item semiquantitative food-frequency questionnaire at baseline (1993–1998) when participants were 45–74 years. Cognitive impairment was defined using a Singapore modified version of Mini-Mental State Examination during follow-up three visits (2014–2016) when participants were 61–96 years. Multivariable logistic regression models were used to estimate odds ratio (OR) and 95% confidence interval (CI).
Cognitive impairment was present in 2443 (14.4%) participants. Compared to the lowest quartile, the highest quartile of red meat intake was associated with increased risk of cognitive impairment (OR 1.16, 95% CI 1.01–1.32, P for trend = 0.009), while the corresponding value for poultry intake was 0.89 (95% CI 0.78–1.02, P for trend = 0.10). Higher fresh fish/shellfish was associated with a lower risk of cognitive impairment (OR 0.88, 95% CI 0.77–1.00, P for trend = 0.03), while preserved fish/shellfish intake was associated with a higher risk (OR 1.19, 95% CI 1.04–1.36, P for trend = 0.01).
This study found that a higher intake of red meat in midlife was associated with increased likelihood of cognitive impairment in later life, while substitution of red meat intake with poultry or fresh fish/shellfish was associated with reduced risk.
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We thank Siew-Hong Low of the National University of Singapore for supervising the fieldwork of the Singapore Chinese Health Study and Renwei Wang for the maintenance of the cohort study database. Finally, we acknowledge the founding Principal Investigator of the Singapore Chinese Health Study, Mimi C. Yu.
The study was supported by Grants from the National Medical Research Council, Singapore (NMRC/CSA/0055/2013) and the National Institutes of Health (Grants R01 CA144034 and UM1 CA182876). An Pan is supported by the National Key Research and Development Program of China (2017YFC0907504) and Hubei Province Science Fund for Distinguished Young Scholars (2018CFA033).
Conflict of interest
The authors declare that they have no conflict of interest.
The study was approved by the Institutional Review Board of the National University of Singapore.
Informed consent forms were obtained from all participants included in the study.
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Jiang, YW., Sheng, LT., Pan, XF. et al. Meat consumption in midlife and risk of cognitive impairment in old age: the Singapore Chinese Health Study. Eur J Nutr 59, 1729–1738 (2020). https://doi.org/10.1007/s00394-019-02031-3
- Red meat
- Cognitive impairment
- Cohort study