LONDON, Aug. 4 — Whether you drink more than 14 units of alcohol a week or totally abstain from it during middle age, you could probably at increased risk of developing dementia, according to a study released Thursday by the University College London (UCL).
Researchers from French national institute of health and medical research (INSERM) and UCL investigated the association between midlife alcohol consumption and risk of dementia into early old age.
Their findings are based on 9,087 British civil servants aged between 35 and 55 in 1985 who were taking part in the Whitehall II Study, which is looking at the impact of social, behavioural, and biological factors on long-term health.
Participants were assessed at regular intervals between 1985 and 1993 on their alcohol consumption and alcohol dependence. Alcohol consumption trajectories between 1985 and 2004 were also used to examine the association of long-term alcohol consumption and risk of dementia from midlife to early old age.
Of the 9,087 participants, 397 cases of dementia were recorded over an average follow-up period of 23 years, and average age at dementia diagnosis was 76 years, according to the study.
The researchers found that abstinence in midlife or drinking more than 14 units a week was associated with a higher risk of dementia compared with drinking one to 14 units of alcohol a week, said Severine Sabia from UCL and INSERM.
Meanwhile, among those drinking above 14 units a week of alcohol, every seven unit a week increase in consumption was associated with 17 percent increase in dementia risk, said Sabia.
In Britain, 14 units of alcohol a week is now the recommended maximum limit for both men and women, but many countries still use a much higher threshold to define harmful drinking.
However, the researchers said that this is an observational study, so no firm conclusions can be drawn about cause and effect, and they cannot rule out the possibility that some of the risk may be due to unmeasured factors.
The study has been published in the journal BMJ. – XINHUA
Heavy drinking, long-term abstinence could both contribute to dementia risk: study
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