12 Feb 2016
What was once just an idea now seems more certain: In developed countries, the number of new cases of dementia is on the decline. In the February 11 New England Journal of Medicine, researchers led by Sudha Seshadri at the Boston University School of Medicine report findings from the Framingham Heart Study that reveal a steadily falling dementia incidence, with rates cut almost in half over four decades. The decline correlated with improvements in cardiovascular health, but this alone did not explain the whole effect. The findings add weight to other recent studies from the United States and Europe that reported fewer new cases and a higher average age at disease onset.
“There’s an emerging consensus that the rates are going down. People are beginning to believe it,” said Eric Larson at Group Health Research Institute, Seattle. He was not involved in the study.
At the same time, many questions remain, including …