title: The Generation R study: a candidate gene study and genome-wide association study (GWAS) on health-related quality of life (HRQOL) of mothers and young children.
abstract: OBJECTIVE
  The aim of this paper is to describe the Generation R study as a template that enables candidate gene study and genome-wide association study regarding health-related quality of life (HRQOL) of mothers and their young children.
  
  
  METHODS
  Generation R is a population-based prospective cohort study from fetal life onwards in Rotterdam, The Netherlands. Children were born in 2002-2006. Blood from mothers and placenta cord blood were sampled. Mothers' HRQOL was measured 5 times during pregnancy and after birth using SF-12 and EQ-5D. Children's HRQOL was measured 5 times between age 1 and 5/6 years using Infant-Toddler Quality Of Life questionnaire (ITQOL), Health Status Classification System PreSchool (HSCS-PS) and Child Health Questionnaire Parent Form 28 items (CHQ-PF28), respectively.
  
  
  RESULTS
  DNA is available for 8,055 mothers and 5,908 children. Genotyping of various candidate genes and a genome-wide association (GWA) scan (Illumina 610K) of child DNA were done. A template for gene-HRQOL analyses is provided. We start with candidate gene study on HRQOL of mothers and children. Gene-environment interaction and interaction with medical indicators of health status will be explored. Next, GWA study on HRQOL will be performed.
  
  
  CONCLUSIONS
  Gaining insight into the determinants of HRQOL is essential to assisting efforts in health policy and clinical application to improve well-being and health. In the future, it might be possible to complement HRQOL assessments by examinations of genetic markers. Strengths and weaknesses of the Generation R study are discussed.
authors.affiliation: Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands. h.raat@erasmusmc.nl
authors.forename: Hein
authors.initials: H
authors.lastname: Raat
authors.forename: Lenie
authors.initials: L
authors.lastname: van Rossem
authors.forename: Vincent W V
authors.initials: VW
authors.lastname: Jaddoe
authors.forename: Jeanne M
authors.initials: JM
authors.lastname: Landgraf
authors.forename: David
authors.initials: D
authors.lastname: Feeny
authors.forename: Henriëtte A
authors.initials: HA
authors.lastname: Moll
authors.forename: Albert
authors.initials: A
authors.lastname: Hofman
authors.forename: Johan P
authors.initials: JP
authors.lastname: Mackenbach
mesh_terms: D002648:Child; D002675:Child, Preschool; D004247:DNA; D005260:Female; D020022:Genetic Predisposition to Disease; D055106:Genome-Wide Association Study / Q000379:methods*; D005838:Genotype; D006304:Health Status; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009035:Mothers; D009426:Netherlands; D011247:Pregnancy / Q000097:blood; D011446:Prospective Studies; D011788:Quality of Life; D018434:Sickness Impact Profile
chemical_list: D004247:DNA