Childhood IQ and all-cause mortality before and after age 65: prospective observational study linking the Scottish Mental survey 1932 and the Midspan studies

C. L. Hart, M. Taylor, G. D. Smith, Lawrence Jeffrey Whalley, J. M. Starr, D. J. Hole, V. Wilson, I. Deary

    Research output: Contribution to journalArticle

    41 Citations (Scopus)

    Abstract

    Objectives. The objective was to investigate how childhood IQ related to all-cause mortality before and after age 65.

    Design. The Midspan prospective cohort studies, followed-up for mortality for 25 years, were linked to individuals' childhood IQ from the Scottish Mental Survey 1932.

    Methods. The Midspan studies collected data on risk factors for cardiorespiratory disease from a questionnaire and at a screening examination, and were conducted on adults in Scotland in the 1970s. An age 11 IQ from the Scottish Mental Survey 1932, a cognitive ability test conducted on 1921-born children attending schools in Scotland, was found for 938 Midspan participants. The relationship between childhood IQ and mortality risk, adjusting for adulthood socio-economic confounders, was analysed. The effect of adjustment for childhood IQ on the relationship between established risk factors (blood pressure, smoking, height and respiratory function) and mortality was also investigated.

    Results. For deaths occurring up to age 65, there was a 36% increased risk per standard deviation decrease (15 points) in childhood IQ which was reduced to 29% after adjusting for social class and deprivation category. There was no statistically significant relationship between childhood IQ and deaths occurring after the age of 65. Adjustment for childhood IQ attenuated the risk factor-mortality relationship in deaths occurring up to age 65, but had no effect in deaths occurring after age 65.

    Conclusions. Childhood IQ was significantly related to deaths occurring up to age 65, but not to deaths occurring after age 65.

    Original languageEnglish
    Pages (from-to)153-165
    Number of pages12
    JournalBritish Journal of Health Psychology
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - 2005

    Keywords

    • CARDIOVASCULAR-DISEASE
    • BLOOD-PRESSURE
    • SOCIAL-CLASS
    • FOLLOW-UP
    • CARDIORESPIRATORY DISEASE
    • PSYCHOSOCIAL FACTORS
    • GENERAL-POPULATION
    • COGNITIVE FUNCTION
    • ADULT MORTALITY
    • RISK-FACTORS

    Cite this

    Childhood IQ and all-cause mortality before and after age 65: prospective observational study linking the Scottish Mental survey 1932 and the Midspan studies. / Hart, C. L.; Taylor, M.; Smith, G. D.; Whalley, Lawrence Jeffrey; Starr, J. M.; Hole, D. J.; Wilson, V.; Deary, I.

    In: British Journal of Health Psychology, Vol. 10, No. 2, 2005, p. 153-165.

    Research output: Contribution to journalArticle

    Hart, C. L. ; Taylor, M. ; Smith, G. D. ; Whalley, Lawrence Jeffrey ; Starr, J. M. ; Hole, D. J. ; Wilson, V. ; Deary, I. / Childhood IQ and all-cause mortality before and after age 65: prospective observational study linking the Scottish Mental survey 1932 and the Midspan studies. In: British Journal of Health Psychology. 2005 ; Vol. 10, No. 2. pp. 153-165.
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    abstract = "Objectives. The objective was to investigate how childhood IQ related to all-cause mortality before and after age 65.Design. The Midspan prospective cohort studies, followed-up for mortality for 25 years, were linked to individuals' childhood IQ from the Scottish Mental Survey 1932.Methods. The Midspan studies collected data on risk factors for cardiorespiratory disease from a questionnaire and at a screening examination, and were conducted on adults in Scotland in the 1970s. An age 11 IQ from the Scottish Mental Survey 1932, a cognitive ability test conducted on 1921-born children attending schools in Scotland, was found for 938 Midspan participants. The relationship between childhood IQ and mortality risk, adjusting for adulthood socio-economic confounders, was analysed. The effect of adjustment for childhood IQ on the relationship between established risk factors (blood pressure, smoking, height and respiratory function) and mortality was also investigated.Results. For deaths occurring up to age 65, there was a 36{\%} increased risk per standard deviation decrease (15 points) in childhood IQ which was reduced to 29{\%} after adjusting for social class and deprivation category. There was no statistically significant relationship between childhood IQ and deaths occurring after the age of 65. Adjustment for childhood IQ attenuated the risk factor-mortality relationship in deaths occurring up to age 65, but had no effect in deaths occurring after age 65.Conclusions. Childhood IQ was significantly related to deaths occurring up to age 65, but not to deaths occurring after age 65.",
    keywords = "CARDIOVASCULAR-DISEASE, BLOOD-PRESSURE, SOCIAL-CLASS, FOLLOW-UP, CARDIORESPIRATORY DISEASE, PSYCHOSOCIAL FACTORS, GENERAL-POPULATION, COGNITIVE FUNCTION, ADULT MORTALITY, RISK-FACTORS",
    author = "Hart, {C. L.} and M. Taylor and Smith, {G. D.} and Whalley, {Lawrence Jeffrey} and Starr, {J. M.} and Hole, {D. J.} and V. Wilson and I. Deary",
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    AU - Hart, C. L.

    AU - Taylor, M.

    AU - Smith, G. D.

    AU - Whalley, Lawrence Jeffrey

    AU - Starr, J. M.

    AU - Hole, D. J.

    AU - Wilson, V.

    AU - Deary, I.

    PY - 2005

    Y1 - 2005

    N2 - Objectives. The objective was to investigate how childhood IQ related to all-cause mortality before and after age 65.Design. The Midspan prospective cohort studies, followed-up for mortality for 25 years, were linked to individuals' childhood IQ from the Scottish Mental Survey 1932.Methods. The Midspan studies collected data on risk factors for cardiorespiratory disease from a questionnaire and at a screening examination, and were conducted on adults in Scotland in the 1970s. An age 11 IQ from the Scottish Mental Survey 1932, a cognitive ability test conducted on 1921-born children attending schools in Scotland, was found for 938 Midspan participants. The relationship between childhood IQ and mortality risk, adjusting for adulthood socio-economic confounders, was analysed. The effect of adjustment for childhood IQ on the relationship between established risk factors (blood pressure, smoking, height and respiratory function) and mortality was also investigated.Results. For deaths occurring up to age 65, there was a 36% increased risk per standard deviation decrease (15 points) in childhood IQ which was reduced to 29% after adjusting for social class and deprivation category. There was no statistically significant relationship between childhood IQ and deaths occurring after the age of 65. Adjustment for childhood IQ attenuated the risk factor-mortality relationship in deaths occurring up to age 65, but had no effect in deaths occurring after age 65.Conclusions. Childhood IQ was significantly related to deaths occurring up to age 65, but not to deaths occurring after age 65.

    AB - Objectives. The objective was to investigate how childhood IQ related to all-cause mortality before and after age 65.Design. The Midspan prospective cohort studies, followed-up for mortality for 25 years, were linked to individuals' childhood IQ from the Scottish Mental Survey 1932.Methods. The Midspan studies collected data on risk factors for cardiorespiratory disease from a questionnaire and at a screening examination, and were conducted on adults in Scotland in the 1970s. An age 11 IQ from the Scottish Mental Survey 1932, a cognitive ability test conducted on 1921-born children attending schools in Scotland, was found for 938 Midspan participants. The relationship between childhood IQ and mortality risk, adjusting for adulthood socio-economic confounders, was analysed. The effect of adjustment for childhood IQ on the relationship between established risk factors (blood pressure, smoking, height and respiratory function) and mortality was also investigated.Results. For deaths occurring up to age 65, there was a 36% increased risk per standard deviation decrease (15 points) in childhood IQ which was reduced to 29% after adjusting for social class and deprivation category. There was no statistically significant relationship between childhood IQ and deaths occurring after the age of 65. Adjustment for childhood IQ attenuated the risk factor-mortality relationship in deaths occurring up to age 65, but had no effect in deaths occurring after age 65.Conclusions. Childhood IQ was significantly related to deaths occurring up to age 65, but not to deaths occurring after age 65.

    KW - CARDIOVASCULAR-DISEASE

    KW - BLOOD-PRESSURE

    KW - SOCIAL-CLASS

    KW - FOLLOW-UP

    KW - CARDIORESPIRATORY DISEASE

    KW - PSYCHOSOCIAL FACTORS

    KW - GENERAL-POPULATION

    KW - COGNITIVE FUNCTION

    KW - ADULT MORTALITY

    KW - RISK-FACTORS

    U2 - 10.1348/135910704X14591

    DO - 10.1348/135910704X14591

    M3 - Article

    VL - 10

    SP - 153

    EP - 165

    JO - British Journal of Health Psychology

    JF - British Journal of Health Psychology

    SN - 1359-107X

    IS - 2

    ER -