title: The early life nutritional environment and early life stress as potential pathways towards the metabolic syndrome in mid-life? A lifecourse analysis using the 1958 British Birth cohort.
abstract: Lifecourse studies suggest that the metabolic syndrome (MetS) may be rooted in the early life environment. This study aims to examine the pathways linking early nutritional and psychosocial exposures and the presence of MetS in midlife.
  
  
  
  Data are from the National Child Development Study including individuals born during 1 week in 1958 in Great Britain and followed-up until now. MetS was defined based on the National Cholesterol Education Program Adult Treatment Panel III classification. Mother's pre-pregnancy body mass index (BMI) was used as a proxy of the early nutritional environment and Adverse Childhood Experiences (ACE) as a proxy for early psychosocial stress. Socioeconomic characteristics, pregnancy and birth conditions were extracted as potential confounders. Adult health behaviors, BMI, socioeconomic environment and psychological state were considered as mediating variables. Multivariate models were performed by including variables sequentially taking a lifecourse approach.
  
  
  
  37.5 % of men and 19.8 % of women had MetS. Participants with an obese/overweight mother presented a higher risk of MetS than those whose mother had a normal pre-pregnancy BMI. Men exposed to two ACE or more, and women exposed to one ACE, were more at risk of MetS compared to unexposed individuals. After including confounders and mediators, mother's pre-pregnancy BMI was still associated with MetS in midlife but the association was weakened after including participant's adult BMI. ACE was no longer associated with MetS after including confounders in models.
  
  
  
  The early nutritional environment, represented by mother's pre-pregnancy BMI, was associated with the risk of MetS in midlife. An important mechanism involves a mother-to-child BMI transmission, independent of birth or perinatal conditions, socioeconomic characteristics and health behaviors over the lifecourse. However this mechanism is not sufficient for explaining the influence of mother's pre-pregnancy BMI which implies the need to further explore other mechanisms in particular the role of genetics and early nutritional environment. ACE is not independently associated with MetS. However, other early life stressful events such as emergency caesarean deliveries and poor socioeconomic status during childhood may contribute as determinants of MetS.
authors.affiliation: INSERM, UMR1027, Toulouse, F-31000, France. cyrille.delpierre@inserm.fr.|Université Toulouse III Paul-Sabatier, UMR1027, Toulouse, F-31000, France. cyrille.delpierre@inserm.fr.
authors.forename: C
authors.initials: C
authors.lastname: Delpierre
authors.affiliation: INSERM, UMR1027, Toulouse, F-31000, France.|Université Toulouse III Paul-Sabatier, UMR1027, Toulouse, F-31000, France.
authors.forename: R
authors.initials: R
authors.lastname: Fantin
authors.affiliation: INSERM, UMR1027, Toulouse, F-31000, France.|Université Toulouse III Paul-Sabatier, UMR1027, Toulouse, F-31000, France.|Universidad de Costa Rica, 2060, San José, Costa Rica.
authors.forename: C
authors.initials: C
authors.lastname: Barboza-Solis
authors.affiliation: INSERM, UMR1027, Toulouse, F-31000, France.|Université Toulouse III Paul-Sabatier, UMR1027, Toulouse, F-31000, France.|Department of Epidemiology, Centre Hospitalier Universitaire de Toulouse, Toulouse, France.
authors.forename: B
authors.initials: B
authors.lastname: Lepage
authors.affiliation: Université Bordeaux, Laboratoire NUTRINEURO, UMR 1286, F-33076, Bordeaux, France.|INRA, Lab NUTRINEURO, UMR 1286, F-33076, Bordeaux, France.
authors.forename: M
authors.initials: M
authors.lastname: Darnaudéry
authors.affiliation: INSERM, UMR1027, Toulouse, F-31000, France.|Université Toulouse III Paul-Sabatier, UMR1027, Toulouse, F-31000, France.
authors.forename: M
authors.initials: M
authors.lastname: Kelly-Irving
mesh_terms: D015992:Body Mass Index; D002585:Cesarean Section / Q000009:adverse effects; D002648:Child; D004777:Environment; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008016:Life Change Events; D008297:Male; D039382:Maternal Nutritional Physiological Phenomena; D001523:Mental Disorders / Q000150:complications; D024821:Metabolic Syndrome / Q000209:etiology* / Q000523:psychology; D008875:Middle Aged; D009035:Mothers; D009765:Obesity / Q000150:complications; D050177:Overweight / Q000150:complications; D011247:Pregnancy; D012307:Risk Factors; D012923:Social Class; D013315:Stress, Psychological / Q000150:complications*; D006113:United Kingdom
keywords: Cohort studies; Early nutritional exposure; Early psychosocial exposures; Lifecourse; Metabolic syndrome; Social epidemiology