Researchers Call For Sex-Specific Dementia Prevention After New Alzheimer’s Findings

Women carry a disproportionately heavy burden of Alzheimer’s disease, and new research suggests that several common health problems may impair women’s cognitive function more strongly than men’s. The findings add to growing calls for sex-specific approaches to dementia prevention and treatment.

Researchers at the University of California San Diego School of Medicine analyzed health and cognitive data from more than 17,000 middle-aged and older adults in the United States. Their study, published on May 19, 2026, in Biology of Sex Differences, examined 13 modifiable risk factors already associated with dementia.

The researchers found that conditions such as hypertension, excess body weight, hearing loss, and diabetes were linked to poorer cognitive performance in both sexes, but the negative associations were often stronger in women. These findings suggest that the same risk factor may affect women and men differently.

Women Carry A Greater Alzheimer’s Burden

Nearly 7 million people in the United States are currently living with Alzheimer’s disease, and almost two-thirds of them are women. Longer female life expectancy partly explains this imbalance, but researchers emphasize that longevity alone does not fully account for the difference.

Scientists are increasingly investigating how hormones, genetics, lifestyle, and social influences interact to shape brain aging differently in women and men. Many of these factors, including cardiovascular and mental health, are potentially modifiable through treatment or lifestyle changes.

For the study, researchers used data from the Health and Retirement Study, a long-running nationally representative survey of older Americans. Participants completed cognitive assessments and answered questions related to education, medical history, mood, sleep, and daily habits.

Risk Profiles Differ Between Women And Men

The analysis identified clear sex differences in the prevalence of several dementia-related risk factors. Women were more likely to report depression, physical inactivity, and sleep problems, all of which have previously been linked to cognitive decline.

Approximately 17% of women reported depression, compared with 9% of men. Nearly half of the women were physically inactive, versus 42% of men, while 45% of women reported sleep difficulties, slightly more than men.

Women in the study also had slightly lower average levels of formal education, another established dementia risk factor. Lower educational attainment is believed to reduce cognitive reserve — the brain’s ability to compensate for age-related damage and neurological changes.

Men, on the other hand, had higher rates of hearing loss, diabetes, and heavy alcohol consumption. About 64% of men reported some degree of hearing impairment, compared with 50% of women. Diabetes affected 24% of men and 21% of women, while heavy alcohol use was nearly twice as common among men.

High blood pressure was highly prevalent in both groups, affecting approximately 60% of participants. Average body mass index in both women and men fell within the overweight-to-obese range, highlighting the broad role of cardiometabolic health in brain aging.

Stronger Cognitive Impact In Women

When researchers analyzed how each risk factor related to cognitive performance, several showed a stronger negative association in women than in men. Cardiometabolic factors were particularly notable.

Hypertension and elevated body mass index were both more strongly associated with poorer cognition in women. Although hearing loss and diabetes were more common among men, these conditions were also linked to steeper cognitive decline in women.

These findings suggest that women may be more vulnerable to the neurological consequences of certain health conditions, even when men are more likely to experience the underlying disease itself. The reasons remain unclear and likely involve a combination of biological and social mechanisms.

The authors argue that sex should be treated as a major variable in dementia research, alongside factors such as age and genetics. They note that sex differences remain underexplored in many major diseases, including Alzheimer’s disease, cardiovascular disease, and cancer.

Toward More Personalized Dementia Prevention

The findings support the growing movement toward precision medicine, in which prevention and treatment strategies are tailored to individual risk profiles. Rather than focusing only on how common a risk factor is, clinicians may also need to consider how strongly it affects cognition in women versus men.

Because many of the identified risks are modifiable, targeted prevention strategies may significantly reduce dementia risk. For women, this could include greater emphasis on blood pressure control, weight management, depression treatment, physical activity, and metabolic health monitoring.

Hearing loss management is also emerging as an important intervention. Previous studies suggest that hearing aids and improved auditory care may help slow cognitive decline, especially in older adults already at elevated dementia risk.

Experts stress that no single factor determines whether a person will develop Alzheimer’s disease or another form of dementia. However, reducing the cumulative burden of multiple risk factors throughout midlife and older age may delay disease onset or reduce overall risk at the population level.

Unanswered Questions And Future Research

The UC San Diego researchers emphasize that more work is needed to understand why women appear more affected by certain dementia-related risks. Hormonal changes across the lifespan, including menopause, may interact with cardiovascular and metabolic health in sex-specific ways.

Genetic influences are another active area of investigation. Researchers continue to examine whether risk genes such as APOE ε4 affect women and men differently.

Social determinants of health may also contribute to women’s increased vulnerability. Caregiving responsibilities, income inequality, chronic stress, and differences in access to preventive healthcare could all influence long-term cognitive health outcomes.

Future research will likely combine large epidemiological datasets with brain imaging, biomarker analysis, and clinical trials to better understand these mechanisms and evaluate targeted interventions.

The authors hope that these more nuanced insights will eventually lead to prevention and treatment strategies that better protect both women and men from dementia.