Education, better prevention and the treatment of high blood pressure may be delaying seniors’ signs of dementia and Alzheimer’s, according to studies reported on in the New England Journal of Medicine.

Regular exercise and lower blood sugar levels may also slow the onset of the disease.

 “We’re optimistic about this lengthening of the time that people can live without dementia,” said researcher Eric B. Larson, M.D. the executive director of Group Health Research Institute and Group Health’s vice president for research. “Dementia in those affected may be starting later in the course of life, closer to the time of death.”