
Mid-density neighborhoods linked to higher dementia deaths, study finds
A JAMA Network Open study links higher dementia mortality to mid-density neighborhoods (roughly 20–40 people per hectare, about 5,000–10,000 per square mile), typically suburbs near big cities where access to doctors and walkability are limited. Denser cities and rural areas show weaker associations. The research suggests improving nearby primary care, public transport, and safe walking routes could avert tens of thousands of dementia deaths over a decade, with the largest gains in underserved communities.













