Cited by 127Health disparities and outcomesCognitive Abilities and TestingIntergenerational and Educational Inequality Studies

Intelligence in youth and health at age 50

Open access
Wraw, Christina, Deary, Ian J., Gale, Catharine R., Der, Geoff·2015·Intelligence

Abstract

BACKGROUND: The link between intelligence in youth and all-cause mortality in later-life is well established. To better understand this relationship, the current study examines the links between pre-morbid intelligence and a number of specific health outcomes at age 50 using the NLSY-1979 cohort. METHODS: Participants were the 5793 participants in the NLSY-79 who responded to questions about health outcomes at age 50. Sixteen health outcomes were examined: two were summary measures (physical health and functional limitation), 9 were diagnosed illness conditions, 4 were self-reported conditions, and one was a measure of general health status. Linear and logistic regressions were used, as appropriate, to examine the relationship between intelligence in youth and the health outcomes. Age, sex and both childhood and adult SES, and its sub-components - income, education, & occupational prestige - are all adjusted for separately. RESULTS & CONCLUSION: Higher pre-morbid intelligence is linked with better physical health at age 50, and a lower risk for a number of chronic health conditions. For example, a 1 SD higher score in IQ was significantly associated with increased odds of having good, very good, or excellent health, with an odds ratio of 1.70 (C.I. 1.55-1.86). Thirteen of the illness outcomes were significantly and negatively associated with IQ in youth; the odds ratios ranged from 0.85 for diabetes/high blood sugar to 0.65 for stroke, per one standard deviation higher score in IQ. Adjustment for childhood SES led to little attenuation but adult SES partially mediated the relationship for a number of conditions. Mediation by adult SES was not consistently explained by any one of its components-income, education, and occupation status. The current findings contribute to our understanding of lower intelligence as a risk factor for poor health and how this may contribute to health inequalities.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.intell.2015.08.001

Cites

76 of 76 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Intelligence is a major determinant of human health and well-being.

    “a major determinant of human health and well-being 2”

    From Genome-wide association meta-analysis in 269,867 individuals identifies new genetic and functional links to intelligence (2018) · cites this paper as [2]

    The Abstract’s Results & conclusion and the Discussion (page numbers not provided) link higher intelligence in youth with better physical health and fewer chronic conditions at age 50. They describe associations, not intelligence as a major determinant of human health generally, and the study does not establish an effect on well-being. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

3 of the 79 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Kuh D. Ben-Shlomo Y. Lynch J. Hallqvist J. Power C. Life course epidemiology Journal of Epidemiology and Community Health 57 2003 778 783 14573579 PMC1732305

Cited by

Sorted by citations

Authors
Wraw, C., Deary, I. J., Gale, C. R., & Der, G.
Affiliations
  • University of Edinburgh (GB)
  • MRC/CSO Social and Public Health Sciences Unit (GB)
Corresponding author
Wraw, Christina
Venue
Intelligence
Publisher
Elsevier BV
Published
2015-11
Volume
53
Pages
23-32
ISSN
0160-2896 (ISSN-L)
OpenAlex
W1616789613
Cited by
127
References
79
Citations by year
2026: 4 · 2025: 12 · 2024: 12 · 2023: 9 · 2022: 19 · 2021: 9 · 2020: 8 · 2019: 17 · 2018: 10 · 2017: 17 · 2016: 8 · 2015: 2
FWCI
15.32
Type
journal article
Language
en
Open access
Locations
  • Intelligence (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by-nc-nd)
Funders
Medical Research Council (MR/K026992/1, MC_UU_12011/2)
Topics
  • Social Sciences › Health › Health disparities and outcomes
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
  • Social Sciences › Sociology and Political Science › Intergenerational and Educational Inequality Studies
Keywords
child intelligence, IQ, physical health, functional limitations, chronic disease, health disparities, socioeconomic status, mediation, diabetes mellitus, stroke, self-reported health

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review