New research suggests a person's outlook on life may influence their risk of developing dementia. A study published in the Journal of the American Geriatrics Society followed more than 9,000 cognitively healthy adults for up to 14 years. During that period, over 3,000 participants developed dementia.
Those reporting higher levels of optimism had about a 15% lower risk of dementia, even after adjusting for age, education, depression, and other health conditions. The findings were consistent across demographic groups.
"Our personal emotional and social resources - like how hopeful and positive we feel about the future - may be related to keeping our brains healthy," said lead author Säde Stenlund of the Harvard T.H. Chan School of Public Health.
The study is observational and cannot prove optimism directly reduces dementia risk. Mood changes could also be an early sign of the condition. However, the findings point to a potential area for future research and intervention.
"Since optimism may be increased through relatively simple, low-intensity programs, it is helpful to understand how it is related to health in aging," Stenlund noted.
Experts emphasize that lifestyle factors like diet, exercise, social engagement, and addressing hearing loss also play a key role in brain health. More studies, including clinical trials, are needed to determine if boosting optimism can measurably impact long-term dementia risk.