Does coffee really lower the risk of dementia?
From our UK edition
People who drink coffee and tea are less likely to suffer dementia, according to a large study published this week. The research is from Harvard and appears in the Journal of the American Medical Association (JAMA), one of my profession’s top outlets. There is every reason to presume its conclusion is wrong. A total of 131,821 people were followed over a period of up to 43 years. The number of dementia cases was high, giving the study good statistical power. Every few years a dietary questionnaire asked participants how much tea and coffee they drank: After adjusting for potential confounders ... higher caffeinated coffee intake was significantly associated with lower dementia risk ... and lower prevalence of subjective cognitive decline.