title: Maternal intelligence-mental health and child neuropsychological development at age 14 months.
abstract: OBJECTIVE
  To examine the relationship between maternal intelligence-mental health and neuropsychological development at age 14 months in a normal population, taking into account maternal occupational social class and education.
  
  
  METHODS
  We prospectively studied a population-based birth cohort, which forms part of the INMA (Environment and Childhood) Project. Cognitive and psychomotor development was assessed at 14 months using Bayley Scales of Infant Development. Maternal intelligence and mental health were assessed by the Cattell and Cattell test and the General Health Questionnaire-12 respectively.
  
  
  RESULTS
  We observed a crude association between maternal intelligence and cognitive development in children at 14 months but this association disappeared when maternal education was included. The associations were stratified by maternal education and occupational social class. Within the manual maternal occupational social class, there was a significant difference in cognitive development between children whose mothers scored in the highest tertile of maternal IQ and those whose mothers scored in the lowest tertile. In contrast, no differences were observed among children whose mothers were in the non-manual occupational social class.
  
  
  CONCLUSIONS
  The association between maternal intelligence and child cognitive development differed by occupational social class. While this association was not confounded by education or other variables in manual occupational social classes, maternal education explained this association among advantaged occupational social classes.
authors.affiliation: Center for Research in Environmental Epidemiology, Barcelona, Spain. jforns@creal.cat
authors.forename: Joan
authors.initials: J
authors.lastname: Forns
authors.forename: Jordi
authors.initials: J
authors.lastname: Julvez
authors.forename: Raquel
authors.initials: R
authors.lastname: García-Esteban
authors.forename: Mònica
authors.initials: M
authors.lastname: Guxens
authors.forename: Muriel
authors.initials: M
authors.lastname: Ferrer
authors.forename: James
authors.initials: J
authors.lastname: Grellier
authors.forename: Martine
authors.initials: M
authors.lastname: Vrijheid
authors.forename: Jordi
authors.initials: J
authors.lastname: Sunyer
mesh_terms: D000328:Adult; D002657:Child Development; D005260:Female; D006801:Humans; D007223:Infant; D007360:Intelligence; D008297:Male; D008603:Mental Health; D009035:Mothers / Q000523:psychology*; D009420:Nervous System / Q000254:growth & development*; D011446:Prospective Studies; D002666:Psychology, Child