Taiwan Study Finds Spouses Face 74% Higher Dementia Risk as Income and Children Buffer Odds
Updated
Updated · ABC News · Jul 21
Taiwan Study Finds Spouses Face 74% Higher Dementia Risk as Income and Children Buffer Odds
2 articles · Updated · ABC News · Jul 21
Summary
Nearly 1 million married people in Taiwan were tracked, and spouses of dementia patients showed sharply higher risk—74% for women and 69% for men—with similar patterns across Alzheimer's and vascular dementia.
After adjusting for age and other risks, the excess burden equated to 2.75 additional dementia cases per 100 women and 3.49 per 100 men over five years.
Higher household income and more children were linked to lower spousal risk, a pattern researchers said may reflect more education, family support and less caregiving strain in better-resourced households.
The team said assortative mating, shared diet and exercise habits, and caregiver stress could all help explain the link, but the database could not directly measure lifestyle, social isolation or caregiving intensity.
Researchers and outside experts said the findings support dementia care that targets the whole household, while future studies test whether lifestyle or caregiving stress drives more of the risk.
Could the stress of caregiving physically trigger dementia in a healthy spouse?
Dementia is diagnosed in one person, but what if the real patient is the couple?
Married Couples and Dementia: Taiwan’s 1-Million-Person Study Reveals 70% Increased Spousal Risk and What It Means for Prevention
Overview
A major study published in July 2026 used health data from nearly 1 million married people in Taiwan to explore how dementia risk is shared between spouses. The research found that if one partner is diagnosed with dementia, the other faces a much higher risk of developing the condition—74% higher for women and 69% higher for men. This increased risk was seen across all types of dementia and highlights a strong shared vulnerability within marriages. The study’s large scale and long timeframe provide strong evidence that a spouse’s dementia diagnosis significantly raises the other partner’s risk.