ArticleJournal of the American Geriatrics Society2020
Cognitive Performance Among Older Persons in Japan and the United States.
Article in Journal of the American Geriatrics Society, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
3 citing papers in PubMed, 5 citations in OpenAlex.
- Self-Reported ADHD Symptoms and Cognitive Performance in a National Sample of US Older Adults.Journal of attention disorders · 2026Article
- The decline in cognitive function with age and its changes over time in cognitively normal older adults.European geriatric medicine · 2026Article
- Subjective and Objective Mental and Physical Functions Affect Subjective Cognitive Decline in Community-Dwelling Elderly Japanese People.Healthcare (Basel, Switzerland) · 2020Article
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 2 countries.
Funding
Abstract
objectiveTo compare cognitive performance among Japanese and American persons, aged 68 years and older, using two nationally representative studies and to examine whether differences can be explained by differences in the distribution of risk factors or in their association with cognitive performance.
designNationally representative studies with harmonized collection of data on cognitive functioning.
settingNihon University Japanese Longitudinal Study of Aging and the US Health and Retirement Study.
participantsA total of 1953 Japanese adults and 2959 US adults, aged 68 years or older. MEASUREMENTS: Episodic memory and arithmetic working memory are measured using immediate and delayed word recall and serial 7s.
resultsAmericans have higher scores on episodic memory than Japanese people (0.72 points on a 20-point scale); however, when education is controlled, American and Japanese people did not differ. Level of working memory was higher in Japan (0.36 on a 5-point scale) than in the United States, and the effect of education on working memory was stronger among Americans than Japanese people. There are no differences over the age of 85 years.
conclusionEven with large differences in educational attainment and a strong effect of education on cognitive functioning, the overall differences in cognitive functioning between the United States and Japan are modest. Differences in health appear to have little effect on national differences in cognition. J Am Geriatr Soc 68:354-361, 2020.
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Registered trials
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