A large-scale study from Taiwan involving nearly one million married adults found that spouses of individuals diagnosed with dementia have a significantly increased risk of developing the condition themselves.

While previous smaller studies hinted at this correlation, this research is notable for its scale and depth, analyzing health records from Taiwan’s national insurance program between 1998 and 2022.

The study accounted for factors like age, income, and pre-existing health conditions, revealing that women with spouses diagnosed with dementia had a 74% higher relative risk, while men faced a 69% increase.Absolute risk figures showed around 6.5% of women and 9.2% of men developed dementia within five years compared to lower rates in the control group.

Researchers emphasize that this is not evidence of direct transmission but rather shared health profiles shaped by decades of similar lifestyles, environments, and behaviors.Possible explanations include chronic stress from caregiving, disrupted sleep, and shared environmental factors like diet and activity levels.

The study underscores the complex interplay between individual choices and societal influences in dementia risk, advocating for broader public health approaches beyond personal responsibility.