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A scientific review involving about 2.8 million people found that smoking is associated with an increased risk of dementia, Alzheimer's disease and vascular dementia, with the risk rising as the number of cigarettes smoked per day increases. According to the study, which was led by researchers from Curtin University in Australia and published in the journal "eClinicalMedicine", smokers face a 31% higher risk of developing dementia compared with people who have never smoked. The risk rose to 40% for Alzheimer's disease and to 52% for vascular dementia. The researchers observed a link between the number of cigarettes smoked per day and the likelihood of developing dementia.
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