Summary: A new study led by UCL shows that socioeconomic factors — including education, occupation and wealth — influence the risk of developing cognitive impairment and dementia in later life, and also affect the likelihood of recovery. Following 8,442 adults aged 50 and over in England for 10 years, researchers report that people with higher socioeconomic status were less likely to move from healthy cognition to impairment and were more likely to improve after mild impairment.
The authors suggest that formal education, mentally stimulating work and greater financial resources may contribute to “brain resilience,” delaying or reducing the progression of neurocognitive disorders and increasing the chances of returning to healthier cognition after early decline.
Key facts:
- Higher socioeconomic status is associated with lower dementia risk. Post‑secondary education was linked with a 43% lower chance of progressing from healthy cognition to mild impairment.
- Individuals in the wealthiest third of the population had a 26% lower likelihood of moving from mild cognitive impairment to dementia.
- People in advantaged groups were substantially more likely to recover from mild cognitive impairment, with reported increases in the odds of reversion ranging from about 56% to 81% for certain socioeconomic indicators.
Source: UCL
Overview
Published in Scientific Reports, the study used data from a nationally representative sample of 8,442 adults in England, tracked from 2008/09 through 2018/19. Researchers used multistate statistical models to estimate transitions between cognitive states — no cognitive impairment (NOCI), cognitive impairment no dementia (CIND, often called mild cognitive impairment), dementia — and death. The analysis also examined the possibility of a reverse transition, where individuals move from CIND back to NOCI.
Socioeconomic information was gathered through participant questionnaires and grouped into standard indicators: educational attainment, occupational class, and household wealth. Cognitive status was determined using a combination of sources, including doctor diagnoses reported by participants, cognitive test scores, and self-reported symptoms, which together offered a comprehensive assessment of each person’s cognitive health. Models were adjusted for demographic variables such as age, sex and marital status.
By estimating both the probability of moving between cognitive states and the expected time spent in each state, the research provides a detailed picture of how socioeconomic position (SEP) affects not only the development of cognitive disorders but also the duration and potential reversibility of early impairment.
Key findings indicate that people from more advantaged socioeconomic backgrounds — particularly those with post‑secondary education, managerial or professional occupations, and those in the top third of wealth — were less likely to transition from healthy cognition to mild impairment and less likely to progress from mild impairment to dementia, compared with people who had only primary or secondary education, worked in routine/manual occupations, or were among the least wealthy third of the population.
For example, post‑secondary education was associated with a 43% lower risk of moving from a healthy cognitive state to mild cognitive impairment. Similarly, being among the wealthiest third was associated with a 26% lower chance of progressing from mild impairment to dementia.
The study also found that socioeconomic advantage increased the likelihood of recovery from mild cognitive impairment. Wealthier individuals showed a substantially higher probability of reverting to healthy cognition, and other indicators of advantage — such as higher education and certain occupational levels — were likewise linked to higher chances of improvement.
Senior author Dr Dorina Cadar (UCL Department of Behavioural Science and Health and Brighton and Sussex Medical School) commented that the findings underline the importance of wealth, education and occupation not only in reducing progression to dementia but also in supporting reversals to healthier cognition. She notes that such recovery can improve quality of life in later years and reduce the broader social and healthcare burden of cognitive decline.
Lead author Aswathikutty Gireesh (UCL Epidemiology & Health Care) highlights plausible mechanisms: education and cognitively demanding occupations may build cognitive reserve, while financial resources can provide better access to healthcare, nutritious food, exercise opportunities and preventive care — all factors that may help preserve or stabilise cognitive function, especially when impairment is detected early.
The authors acknowledge that the study cannot definitively explain the causal pathways linking SEP to cognitive outcomes. Nevertheless, the evidence supports further investigation into how socioeconomic resources — particularly wealth — might protect against early progression of neurocognitive disorders and promote recovery.
Funding: National Institute on Aging, National Institute for Health and Care Research (NIHR), and UK Research and Innovation (Economic and Social Research Council and the Biotechnology and Biological Sciences Research Council).
About this cognition and dementia research news
Author: Poppy Tombs ([email protected])
Source: UCL
Contact: Poppy Tombs – UCL
Image: The image is credited to Neuroscience News
Original research: Open access. “Socioeconomic inequalities linked to the transitioning to neurocognitive disorders and mortality” by Dorina Cadar et al., Scientific Reports (open access).
Abstract
Socioeconomic inequalities linked to the transitioning to neurocognitive disorders and mortality
Research on the role of socioeconomic position (SEP) in the development and potential reversal of mild neurocognitive impairment is limited. This study used nationally representative English data and multistate models to investigate how SEP relates to transitions from no cognitive impairment (NOCI) to cognitive impairment no dementia (CIND), dementia and death, as well as the reverse transition from CIND back to NOCI.
The probabilities of moving between states and the time spent in each state differed substantially by SEP. Higher wealth was associated with a greater likelihood of reversing mild impairment back to healthy cognition [HR = 1.56, CI (1.42, 1.72)]. These results suggest that socioeconomic advantage may both protect against progression to early neurocognitive disorders and facilitate recovery from mild impairment. Lower education levels were also linked to higher mortality risk after dementia onset.