Birth weight standardized to gestational age and intelligence in young adulthood: a register-based birth cohort study of male siblings

American Journal of Epidemiology
Willy EriksenKristian Tambs

Abstract

The authors aimed to determine the relation between birth-weight variations within the normal range and intelligence in young adulthood. A historical birth cohort study was conducted. Data from the Medical Birth Register of Norway were linked with register data from the Norwegian National Conscript Service. The sample comprised 52,408 sibships of full brothers who were born singletons at 37-41 completed weeks' gestation during 1967-1984 in Norway and were intelligence-tested at the time of mandatory military conscription. Generalized estimating equations were used to fit population-averaged panel data models. The analyses showed that in men with birth weights within the 10th-90th percentile range, a within-family difference of 1 standard deviation in birth weight standardized to gestational age was associated with a within-family difference of 0.07 standard deviation (99% confidence interval: 0.03, 0.09) in intelligence score, after adjustment for a range of background factors. There was no significant between-family association after adjustment for background factors. In Norwegian males, normal variations in intrauterine growth are associated with differences in intelligence in young adulthood. This association is probably not...Continue Reading

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Citations

Dec 1, 2011·Journal of Developmental Origins of Health and Disease·P Factor-LitvakJ Goldstein
Aug 11, 2012·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Willy EriksenKristian Tambs
Dec 18, 2012·International Journal of Epidemiology·Cheng HuangZhiwen Li
Apr 4, 2012·International Journal of Environmental Research and Public Health·Igor BurstynPaul Veugelers
Jan 8, 2015·BMC Psychology·Trine Flensborg-MadsenErik Lykke Mortensen
Jun 6, 2014·Journal of Developmental Origins of Health and Disease·M S PearceS M Sayers
Oct 5, 2014·American Journal of Epidemiology·Petter KristensenTor Bjerkedal
Jul 16, 2010·American Journal of Epidemiology·Ezra SusserMelissa Begg
Nov 8, 2016·International Journal of Epidemiology·Kathryn AbelChristina Dalman
Apr 26, 2016·International Journal of Behavioral Development·Kirby Deater-Deckard
Nov 30, 2016·European Journal of Pediatrics·Trine Flensborg-Madsen, Erik Lykke Mortensen
Nov 5, 2016·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Hikaru Takeuchi, Ryuta Kawashima
Feb 7, 2019·Journal of Developmental Origins of Health and Disease·E C McEwenR Smith
Jul 12, 2012·Epidemiology·Thomas FrisellArvid Sjölander

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