Longitudinal cohort study of childhood IQ and survival up to age 76

Citation
Lj. Whalley et Ij. Deary, Longitudinal cohort study of childhood IQ and survival up to age 76, BR MED J, 322(7290), 2001, pp. 819-822
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
General & Internal Medicine","Medical Research General Topics
Journal title
BRITISH MEDICAL JOURNAL
ISSN journal
0959-535X → ACNP
Volume
322
Issue
7290
Year of publication
2001
Pages
819 - 822
Database
ISI
SICI code
0959-535X(20010407)322:7290<819:LCSOCI>2.0.ZU;2-Y
Abstract
Objectives To test the association between childhood IQ and mortality over the normal human lifespan. Design Longitudinal cohort study. Setting Aberdeen. Subjects All 2792 children in Aberdeen born in 1921 and attending school on 1 June 1932 who sat a mental ability test as part of the Scottish mental s urvey 1932. Main outcome measure Survival at 1 January 1997. Results 79.9% (2230) of the sample was traced. Childhood mental ability was positively related to survival to age 76 years in women (0.978 (0.971 to 0 .984), P < 0.0001) and men (0.989 (0.984 to 0.994), P< 0.0001). A 15 point disadvantage in mental ability at age 11 conferred a relative risk of 0.79 of being alive 65 years later (95% confidence interval 0.75 to 0.84); a 30 point disadvantage reduced this to 0.63 (0.56 to 0.71. However, men who die d during active service in the second world war had a relatively high IQ. O vercrowding in the school catchment area was weakly related to death. Contr olling for this factor did not alter the association between mental ability and mortality. Conclusion Childhood mental ability is a significant factor among the varia bles that predict age at death.