Independent evidence for an association between general cognitive ability and a genetic locus for educational attainment

Joey W. Trampush*, Todd Lencz, Emma Knowles, Gail Davies, Saurav Guha, Itsik Pe'er, David C. Liewald, John M. Starr, Srdjan Djurovic, Ingrid Melle, Kjetil Sundet, Andrea Christoforou, Ivar Reinvang, Semanti Mukherjee, Pamela DeRosse, Astri Lundervold, Vidar M. Steen, Majnu John, Thomas Espeseth, Katri RaikkonenElisabeth Widen, Aarno Palotie, Johan G. Eriksson, Ina Giegling, Bettina Konte, Masashi Ikeda, Panos Roussos, Stella Giakoumaki, Katherine E. Burdick, Antony Payton, William Ollier, Mike Horan, Matthew Scult, Dwight Dickinson, Richard E. Straub, Gary Donohoe, Derek Morris, Aiden Corvin, Michael Gill, Ahmad Hariri, Daniel R. Weinberger, Neil Pendleton, Nakao Iwata, Ariel Darvasi, Panos Bitsios, Dan Rujescu, Jari Lahti, Stephanie Le Hellard, Matthew C. Keller, Ole A. Andreassen, Ian J. Deary, David C. Glahn, Anil K. Malhotra

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Cognitive deficits and reduced educational achievement are common in psychiatric illness; understanding the genetic basis of cognitive and educational deficits may be informative about the etiology of psychiatric disorders. A recent, large genome-wide association study (GWAS) reported a genome-wide significant locus for years of education, which subsequently demonstrated association to general cognitive ability (g) in overlapping cohorts. The current study was designed to test whether GWAS hits for educational attainment are involved in general cognitive ability in an independent, large-scale collection of cohorts. Using cohorts in the Cognitive Genomics Consortium (COGENT; up to 20,495 healthy individuals), we examined the relationship between g and variants associated with educational attainment. We next conducted meta-analyses with 24,189 individuals with neurocognitive data from the educational attainment studies, and then with 53,188 largely independent individuals from a recent GWAS of cognition. A SNP (rs1906252) located at chromosome 6q16.1, previously associated with years of schooling, was significantly associated with g (P=1.47x10(-4)) in COGENT. The first joint analysis of 43,381 non-overlapping individuals for this a priori-designated locus was strongly significant (P=4.94x10(-7)), and the second joint analysis of 68,159 non-overlapping individuals was even more robust (P=1.65x10(-9)). These results provide independent replication, in a large-scale dataset, of a genetic locus associated with cognitive function and education. As sample sizes grow, cognitive GWAS will identify increasing numbers of associated loci, as has been accomplished in other polygenic quantitative traits, which may be relevant to psychiatric illness. (c) 2015 Wiley Periodicals, Inc.

Original languageEnglish
Pages (from-to)363-373
Number of pages11
JournalAmerican Journal of Medical Genetics Part B: Neuropsychiatric Genetics
Issue number5
Early online date7 May 2015
Publication statusPublished - 10 Jun 2015

Keywords / Materials (for Non-textual outputs)

  • neurocognition
  • general cognitive ability
  • educational attainment
  • genetics
  • GWAS
  • proxy phenotype
  • RISK


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