A new study suggests that women may be more vulnerable to certain dementia risk factors than men, and that these differences may appear long before memory problems arise. The research, published in Alzheimer’s Research & Therapy, analyzed data from more than 17,000 adults over age 40 from the Health and Retirement Study, a nationally representative U.S. cohort. The average age of participants was 69.
Researchers examined 13 modifiable dementia risk factors, including depression, sleep quality, cholesterol, diabetes, smoking, hearing loss, blood pressure, obesity, inactivity, alcohol use, vision problems, education level, and social isolation. They compared how common these factors were in women versus men and how strongly they were linked to cognitive performance.
The study found that women had higher rates of elevated cholesterol, depression, physical inactivity, smoking, poor sleep, poor vision, and lower educational attainment. Men had higher rates of diabetes, hearing loss, and heavy alcohol use. However, prevalence alone did not explain the full picture. Several risk factors appeared to affect cognition more strongly in women, particularly hearing loss, hypertension, diabetes, and higher body mass index in midlife. This suggests that women’s brains may be more affected by these conditions over time.
Cardiometabolic health and brain aging
The research highlights a link between brain aging and cardiovascular and metabolic health, especially during and after menopause. As estrogen declines, women experience changes in blood vessels, cholesterol regulation, inflammation, insulin sensitivity, body fat distribution, and blood pressure. These changes can affect brain health.
Hypertension consistently showed a stronger association with worse cognitive performance in women. Researchers noted that women may face unique vascular stressors across their lifespan, including pregnancy complications and menopause-related hormonal changes. Diabetes, while more common in men, appeared to affect women’s cognition more significantly. Higher BMI in women in their 50s and 60s was also associated with worse cognition, aligning with other research on metabolic dysfunction during menopause.
Addressing risk factors
The study’s findings reinforce the importance of managing modifiable risk factors. Cardiovascular fitness, including regular aerobic exercise and strength training, is considered protective for brain health. Exercise improves blood flow, insulin sensitivity, and sleep quality. Sleep is also a key factor, as chronic poor sleep affects blood sugar regulation, inflammation, and memory consolidation.
Treating hearing loss proactively is another important step. Untreated hearing loss is viewed as a cognitive stressor because it increases cognitive load and social withdrawal. The study suggests that dementia prevention may need to be more personalized, particularly for women.
The research indicates that women’s brains may respond differently to health stressors across the lifespan. Addressing these patterns earlier may help change the trajectory of cognitive decline later in life. The study was published in Alzheimer’s Research & Therapy and can be accessed online.
