Dataset Information

Lifecourse Socioeconomic Position and Racial Disparities in BMI Trajectories among Black and White Women: Exploring Cohort Effects in the Americans Changing Lives' Study.

ABSTRACT: Few studies have analyzed the cohort effects of lifecourse socioeconomic position (SEP) on racial disparities in body mass index (BMI) trajectories. We assessed the contribution of lifecourse SEP on racial differences in BMI trajectories among two different age cohorts of women.Four waves of the Americans' Changing Lives' study (1986-2002) were used to compute BMI trajectories for 2194 Black and White women. Multivariable associations of lifecourse SEP variables (father's education, perceived childhood family status, education, income, wealth and financial security) with Wave 1(W1) BMI and BMI change were assessed using mixed models.Black women had higher W1 BMI than White women in both cohorts (women <40 years in 1986 (+2.6 kg/m(2) (95%CI: +1.71, +3.53)) and women>=40 in 1986 (+2.68 kg/m(2) (95%CI:+2.12,3.24))); Black women in the younger cohort had a higher change in BMI (+0.73 kg/m(2)/year (95%CI:+0.17,+1.29)). High education was associated with lower W1 BMI in both cohorts (-1.34 (95%CI:-2.53,-0.15) and -1.08 kg/m(2) (95%CI:-0.50,-1.65), respectively). Among the younger cohort, high income was associated with lower W1 BMI (-0.78kg/m(2)/unit log income (95%CI:-1.32,-0.25)) while among the older cohort, high father's education (-0.78 kg/m(2) (95%CI:-0.06,-1.50)) and higher wealth (-0.26 kg/m(2)(95%CI:-0.43,-0.08))were associated with low W1 BMI. Racial disparities in W1 BMI were attenuated by 20-25% while those for BMI change remained unexplained on adjustment for lifecourse SEP.In this large population-based dataset, results suggest that the contribution of lifecourse SEP to racial disparities in BMI may be established early in adulthood.

SUBMITTER: Insaf TZ

PROVIDER: S-EPMC4262791 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature

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Publications

Lifecourse Socioeconomic Position and Racial Disparities in BMI Trajectories among Black and White Women: Exploring Cohort Effects in the Americans Changing Lives' Study.

Insaf Tabassum Z TZ Shaw Benjamin A BA Yucel Recai M RM Chasan-Taber Lisa L Strogatz David S DS

Journal of racial and ethnic health disparities 20141201 4

<h4>Introduction</h4>Few studies have analyzed the cohort effects of lifecourse socioeconomic position (SEP) on racial disparities in body mass index (BMI) trajectories. We assessed the contribution of lifecourse SEP on racial differences in BMI trajectories among two different age cohorts of women.<h4>Methods</h4>Four waves of the Americans' Changing Lives' study (1986-2002) were used to compute BMI trajectories for 2194 Black and White women. Multivariable associations of lifecourse SEP variab ...[more]

PMID: 25506543

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Project description:ObjectiveTo examine associations of parental socioeconomic position with early-life offspring body mass index (BMI) trajectories in a middle-income country.SubjectsOverall, 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.MethodsCohort 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.ResultsInfants 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.ConclusionsIn Belarus, consistent with some middle-income countries, higher socioeconomic position was associated with greater BMI trajectories from age 3 onwards.

Dataset Information

Lifecourse Socioeconomic Position and Racial Disparities in BMI Trajectories among Black and White Women: Exploring Cohort Effects in the Americans Changing Lives' Study.

Publications

Lifecourse Socioeconomic Position and Racial Disparities in BMI Trajectories among Black and White Women: Exploring Cohort Effects in the Americans Changing Lives' Study.

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