Is healthy lifestyle associated with lower risk of dementia regardless of genetic risk?

(JAMA Network) This observational study looked at whether a healthy lifestyle was associated with a lower risk of dementia regardless of genetic risk. Genetic factors are associated with increased risk of dementia but to what extent these might be offset by lifestyle factors is unknown. Genetic information from the UK Biobank was available for the 196,383 adults in this study who were of European ancestry, at least 60 years old and without dementia at the study baseline.