People who struggled with money over long stretches of early and middle adulthood scored worse on cognitive tests by age 53 than those who did not, according to research led by University College London and published in the journal Innovation in Aging. The analysis drew on 2,759 participants in the MRC National Survey of Health and Development, better known as the 1946 British birth cohort, who filled in questionnaires about their circumstances across much of their lives.
The pattern was not limited to test scores. Among a smaller group of participants who later had brain scans, persistently low income was associated with poorer brain health in their late sixties and early seventies, including greater brain shrinkage. That combination - measurable differences in thinking ability at midlife and structural differences in the brain roughly two decades later - is what gives the finding weight.
The value of a cohort like this one is that financial hardship was recorded as it happened, decade by decade, rather than reconstructed from memory late in life. That makes it easier to see how sustained economic strain, rather than a single bad year, tracks with how the brain ages. The researchers describe an association, not proof that money problems directly cause faster cognitive decline, and the people who experience persistent low income differ from others in many ways that can also affect brain health.
For anyone thinking about dementia risk at a population level, the study points attention upstream, toward the conditions of working life rather than only the years just before symptoms appear.