Childhood literacy and food availability linked to different cognitive aging patterns in two Chinese cohorts
In two Chinese longitudinal datasets, cognitive disparities linked to childhood literacy widened with age, while those linked to childhood food deprivation narrowed; cognitive function declined nonlinearly with age. [1]
Automatic summary · not editorially reviewed
The key findings
The analysis used CHARLS (2011–2018; 17,626 people; mean age 60) and CLHLS (1998–2018; 42,633 people; mean age 85). [1]
Cognitive function declined nonlinearly with age, dropping sharply among the oldest-old. [1]
Disparities linked to childhood literacy generally widened with age, while those linked to childhood food deprivation generally narrowed. [1]
The source at a glance
- Study type / format
- Longitudinal cohort analysis using mixed-effects growth curve models (abstract).
- Population / context
- Adults in two Chinese longitudinal cohorts, mean ages 60 and 85.
- Summary based on
- Study abstract
- Original publication
- August 1, 2026
Two Chinese cohorts, ages 60 and 85 on average
The abstract describes two complementary datasets: the China Health and Retirement Longitudinal Study (CHARLS, 2011–2018; 17,626 people; mean age 60) and the Chinese Longitudinal Healthy Longevity Survey (CLHLS, 1998–2018; 42,633 people; mean age 85). The authors note that most earlier studies combined childhood literacy and food availability into one measure, which may hide their separate roles. They used mixed-effects growth curve models to describe age-related cognitive trajectories and to assess how childhood literacy and food availability were associated with cognitive aging.
Supporting source [1]
Nonlinear decline; literacy gaps widen, food gaps narrow
Cognitive function declined with age in a nonlinear way: it stayed stable in early midlife, declined gradually in late midlife (around China's retirement age) and dropped sharply among the oldest-old. Cognitive disparities associated with childhood literacy generally widened with age, whereas disparities related to childhood food deprivation generally narrowed across the life course. The authors suggest governments expand opportunities for volunteering and other cognitively stimulating activities for retirees, and that different domains of childhood adversity should be distinguished when studying cognitive aging.
Supporting source [1]
Abstract-only scope of the two-cohort analysis
This explainer is based only on the abstract; the full text was not reviewed. The abstract reports the two datasets, their sizes and mean ages, the growth curve models and the described patterns, but gives no effect sizes, confidence intervals or adjustment details. The findings are associations from observational cohort data, not evidence that childhood literacy or food availability causes later cognitive outcomes.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. No effect sizes, confidence intervals or adjustment details are reported. Findings are associations from observational cohort data, not causal evidence.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Yu C, Grol-Prokopczyk H. · europepmc.org · August 1, 2026