The association between family structure and children's BMI over time d the mediating role of income

摘要

Purpose: Although both family structure and income have previously been indicated as being associated with body mass index (BMI), the extent to which the effect of family structure on BMI is mediated through income is incompletely understood. Taking the case of the United Kingdom, this study aims to investigate the association between family structure, defined in this study as whether children live in a oneor two-adult household, and childhood BMI, and whether this varies by child sex and with increased age. Second, the study aims to examine whether family equivalised income, as a proxy for socioeconomic status, mediates the association between family structure and childhood BMI.