Very interesting research about aspects that contribute to brain disease or dementia. I'm surprised by the data showing that 38% in risk level was a combo platter of socioeconomic status (including education level of both the person and their parents, income/wealth and occupation), race and mental health. It looks like people that keep challenging their brains and have time to improve them, will have healthier lives anyways. When I read about researches like this one I want to know about method and data points, and the article don't mention a lot of them.