Persistent Financial Hardship Linked to Faster Brain Aging
A UCL study finds that years of financial strain in early and middle adulthood are associated with poorer thinking skills by age 53 and more signs of brain
Persistent financial hardship may accelerate age-related cognitive decline, according to new research from University College London. The study analyzed data from 2,759 people in the UK tracked from birth as part of the 1946 British cohort study.
Researchers found that individuals who faced ongoing financial difficulties or persistently low income during early and middle adulthood tended to perform worse on cognitive tests by age 53. Among a subgroup who later underwent brain scans, persistent low income was also linked to poorer brain health, including more brain shrinkage, between ages 69 and 71.
Decades of Strain Show Strongest Link
Corresponding author Dr. Jacques Wels said most studies on cognitive aging examine financial hardship at only one point in time. "Our study using several decades of data allows us to see that it is the accumulation of hardship over many years that is linked to the worst cognitive health outcomes, rather than occasional episodes of adversity," Wels stated.
Senior author Professor Praveetha Patalay suggested that supporting people facing financial hardship could help prevent future cognitive decline. The association appeared especially strong among men, people who experienced childhood disadvantage, and those carrying the APOE-ε4 genetic variant linked to Alzheimer's risk.
Men with persistent financial adversity performed worse on cognitive tests at 53 than women in similar circumstances. The researchers suggested disadvantaged men may have been more likely to engage in unhealthy behaviors like smoking. Men born in 1946 may also have felt financial strain more acutely as they were more likely to be primary breadwinners.
How Financial Stress May Affect Cognition
Several pathways could explain the connection between money worries and brain aging. Chronic stress can promote inflammation, which is known to contribute to faster brain aging. Persistent financial concern may also increase cognitive load, constantly consuming mental resources that could be used for other tasks.
An unusual pattern emerged in memory performance. While those with financial hardship generally performed worse on cognitive tests at 53, their scores on a memory test declined more slowly between 53 and 69. Researchers believe this is because these participants had already experienced substantial cognitive losses by midlife, leaving less room for further decline.
Tracking Income and Hardship
Participants reported household income at ages 26, 43, and 53. Researchers classified people as having persistent low income if they fell within the bottom 20% of the group at least twice. About 16% of participants met this definition.
| Measurement | Age Assessed | Definition | Percentage Affected |
|---|---|---|---|
| Persistent Low Income | 26, 43, 53 | Bottom 20% at least twice | 16% (about 1 in 6) |
| Persistent Financial Hardship | 36 to 53 | Questionnaire scores past a threshold at least twice | 12% (about 1 in 8) |
Financial hardship was measured separately through questions about day-to-day pressure, including struggling to manage on income or pay bills. People were classified as having persistent hardship if their scores crossed a threshold at least twice between ages 36 and 53. About 12% of participants fell into this category.
Measuring Brain Health
Cognitive assessments measured verbal memory and processing speed. Magnetic resonance imaging scans evaluated brain health indicators like brain atrophy and ventricular expansion, where fluid-filled cavities in the brain enlarge. The 1946 British cohort study, hosted by UCL, is the world's longest continuously running birth cohort study, with participants recently celebrating their 80th birthdays.
