Beyond Lifestyle: Why Dementia Prevention Requires Systemic Change

Limitations of Individual-Focused Dementia Prevention

Until now, public health strategies have heavily emphasized personal choices to prevent Australia’s leading cause of death. Up to 45 per cent of dementia cases could potentially be averted if 14 potentially modifiable risk factors—such as diabetes, high blood pressure, cholesterol, hearing loss, smoking, and physical inactivity—are addressed during midlife, according to a pivotal 2024 study. However, the Curtin University paper argues that these efforts have led to systemic neglect of broader environmental influences.

To reach these conclusions, researchers mapped 61 risk factors ranging from lifestyle habits to socio-economic status. Of those examined, 49 factors, or 80 per cent, sat at the individual level, while far fewer related to interpersonal or societal conditions. According to study author Jennifer Dunne, factors like education, housing, neighbourhood safety, healthcare access, clean air, and social connections receive inadequate attention despite clear evidence that they dictate a person’s ability to protect their brain health.

For example, we tell people that exercise is necessary, yet maintaining physical activity relies heavily on affordability and the availability of secure environments designated for workouts.

Jennifer Dunne

While acknowledging that standard risk factors remain important, the study demonstrates that many elements shaping dementia risk do not sit solely within an individual’s control.

Broader Sociological and Economic Factors in Brain Health

External experts note that messaging often places the burden squarely on the individual to change their behavior while ignoring interconnected socioeconomic realities. Simone Reppermund, a cognitive disorder researcher at the University of NSW who was not involved in the study, pointed out that these neglected factors are deeply tied to individual actions.

Public appeals frequently frame behavioral modifications as purely personal responsibilities, ignoring how heavily these actions overlap with vital systemic elements that policy decisions and academic studies frequently overlook.

Simone Reppermund

Dr. Reppermund observed that addressing these societal layers is challenging because conditions vary significantly between high-income and low-income countries, as well as across different communities. Nonetheless, researchers emphasize that shifting the strategy is vital for future progress. About 446,500 people live with dementia in Australia, a figure projected to exceed one million by 2065, according to data from Dementia Australia. Dr. Dunne stated that the research team hopes their findings will directly inform future public health prevention policy and look at how individuals live within the wider population.