Long-Term Financial Hardship Linked to Cognitive and Brain Changes Later in Life

Persistent financial hardship across early and middle adulthood was associated with poorer thinking skills in the early 50s and signs of poorer brain health later in life, according to a University College London-led study published in Innovation in Aging.

The researchers analyzed decades of questionnaire data from 2,759 people in the UK who took part in the MRC National Survey of Health and Development, also known as the 1946 British cohort study. Participants reported household income at ages 26, 43 and 53, while financial pressure was assessed separately through questions about managing on their income and paying bills.

People were classified as having persistent low income if they fell within the lowest 20% of the study group at least twice. Around 16% of participants met that definition. Persistent financial hardship was defined using questionnaire scores that crossed a designated threshold at least twice between ages 36 and 53; about 12% fell into that category.

At age 53, participants with ongoing financial difficulties or persistently low income generally performed worse on tests of verbal memory and processing speed. Among a subgroup who later received magnetic resonance imaging scans, persistent low income was also associated with poorer indicators of brain health at ages 69 to 71, including greater brain atrophy, or shrinkage, and ventricular expansion—the enlargement of fluid-filled spaces within the brain.

The associations remained after researchers accounted for childhood cognitive ability, education and childhood disadvantage. The relationship appeared particularly strong among men, people who had experienced disadvantage during childhood and participants carrying APOE-ε4, a genetic variant associated with increased Alzheimer’s disease risk.

The study also found an unexpected pattern in memory scores. Although participants who had experienced financial adversity tended to have lower cognitive performance at 53, their memory declined more slowly between ages 53 and 69. The researchers suggested this could reflect lower starting scores by age 53, leaving less room for additional measured decline over the following years.

The findings come from an observational, life-course analysis, so they show a relationship rather than proving that financial hardship directly caused cognitive decline or structural brain changes. The researchers proposed chronic stress, inflammation and the mental burden of persistent financial worry as possible explanations, but these pathways were not established as causes by the study.

The authors said the results indicate that the accumulation of financial adversity over many years may be more relevant to later cognitive health than occasional episodes of hardship. The study does not show that changing income or financial circumstances would reverse the brain measures observed, but it adds long-term financial conditions to the factors being examined in research on cognitive aging.