1. Parent-Offspring Body Mass Index Associations in the Norwegian Mother and Child Cohort Study: A Family-based Approach to Studying the Role of the Intrauterine Environment in Childhood Adiposity
- Author
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Rolv Skjærven, George Davey Smith, Caroline Fleten, Hein Stigum, Wenche Nystad, Debbie A Lawlor, and Øyvind Næss
- Subjects
Adult ,Pediatrics ,medicine.medical_specialty ,Alcohol Drinking ,Epidemiology ,Offspring ,Population ,Mothers ,Comorbidity ,Overweight ,Body Mass Index ,Cohort Studies ,Fathers ,Pregnancy ,Risk Factors ,Surveys and Questionnaires ,medicine ,Humans ,Obesity ,education ,Life Style ,Adiposity ,education.field_of_study ,Norway ,business.industry ,Body Weight ,Smoking ,Feeding Behavior ,medicine.disease ,Confidence interval ,Diet ,Causality ,Pregnancy Complications ,Breast Feeding ,Nutrition Assessment ,Child, Preschool ,Population Surveillance ,Prenatal Exposure Delayed Effects ,Regression Analysis ,Female ,medicine.symptom ,business ,Breast feeding ,Body mass index ,Demography ,Cohort study - Abstract
In the present study, the authors investigated the role of the intrauterine environment in childhood adiposity by comparing the maternal-offspring body mass index (BMI) association with the paternal-offspring BMI association when the offspring were 3 years of age, using parental prepregnancy BMI (measured as weight in kilograms divided by height in meters squared). The parent-offspring trios (n = 29,216) were recruited during pregnancy from 2001 to 2008 into the Norwegian Mother and Child Cohort Study conducted by The Norwegian Institute of Public Health. Data from self-administered questionnaires were used in linear regression analyses. Crude analyses showed similar parental-offspring BMI associations; the mean difference in offspring BMI was 0.15 (95% confidence interval: 0.13, 0.16) per each 1-standard-deviation increase in maternal BMI and 0.15 (95% confidence interval: 0.13, 0.17) per each 1-standard-deviation increase in paternal BMI. After all adjustments, the mean difference in offspring BMI per each 1-standard-deviation increment of maternal BMI was 0.12, and the mean difference in offspring BMI per each 1-standard-deviation increment of paternal BMI was 0.13. There was no strong support for heterogeneity between the associations (P > 0.6). In conclusion, results from the present large population-based study showed similar parental-offspring BMI associations when the offspring were 3 years of age, which indicates that the maternal-offspring association may be explained by shared familial (environmental and genetic) risk factors rather than by the intrauterine environment.
- Published
- 2012