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Title: Socioeconomic differences in childhood BMI trajectories in Belarus
Authors: Patel, R
Tilling, K
Lawlor, D.A
Howe, L.D
Hughes, R.A
Bogdanovich, N
Matush, L
Nicoli, E
Oken, E
Kramer, M.S 
Martin, R.M
Keywords: Article
birth weight
body height
body mass
cohort analysis
controlled study
educational status
high school
major clinical study
middle income country
preschool child
priority journal
school child
sex difference
social status
child development
Body Mass Index
Child Development
Child, Preschool
Cohort Studies
Educational Status
Infant, Newborn
Republic of Belarus
Socioeconomic Factors
Issue Date: 2018
Publisher: Nature Publishing Group
Citation: Patel, R, Tilling, K, Lawlor, D.A, Howe, L.D, Hughes, R.A, Bogdanovich, N, Matush, L, Nicoli, E, Oken, E, Kramer, M.S, Martin, R.M (2018). Socioeconomic differences in childhood BMI trajectories in Belarus. International Journal of Obesity 42 (9) : 1651-1660. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Objective: To examine associations of parental socioeconomic position with early-life offspring body mass index (BMI) trajectories in a middle-income country. Subjects: Overall, 12,385 Belarusian children born 1996–97 and enrolled in a randomised breastfeeding promotion trial at birth, with 3–14 measurements of BMI from birth to 7 years. Methods: Cohort analysis in which exposures were parental education (common secondary or less; advanced secondary or partial university; completed university) and occupation (manual; non-manual) at birth, and the outcome was BMI z-score trajectories estimated using multilevel linear spline models, controlling for trial arm, location, parental BMI, maternal smoking status and number of older siblings. Results: Infants born to university-educated mothers were heavier at birth than those born to secondary school-educated mothers [by 0.13 BMI z-score units (95% confidence interval, CI: 0.07, 0.19) for girls and 0.11 (95% CI: 0.05, 0.17) for boys; equivalent for an infant of average birth length to 43 and 38 g, respectively]. Between the ages of 3–7 years children of the most educated mothers had larger BMI increases than children of the least educated mothers. At age 7 years, after controlling for trial arm and location, children of university-educated mothers had higher BMIs than those born to secondary school-educated mothers by 0.11 z-score (95% CI: 0.03, 0.19) among girls and 0.18 (95% CI: 0.1, 0.27) among boys, equivalent to differences in BMI for a child of average height of 0.19 and 0.26 kg/m2, respectively. After further controlling for parental BMI, these differences attenuated to 0.08 z-score (95% CI: 0, 0.16) and 0.16 z-score (95% CI: 0.07, 0.24), respectively, but changed very little after additional adjustment for number of older siblings and mother’s smoking status. Associations were similar when based on paternal educational attainment and highest household occupation. Conclusions: In Belarus, consistent with some middle-income countries, higher socioeconomic position was associated with greater BMI trajectories from age 3 onwards. © 2018, The Authors.
Source Title: International Journal of Obesity
ISSN: 03070565
DOI: 10.1038/s41366-018-0042-0
Rights: Attribution 4.0 International
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