Children's consumption of ultra-processed food (UPF) may contribute to inequalities in obesity and wider health. Socioeconomic patterning in younger UK children's UPF intake is unknown. To investigate socioeconomic patterning of UK toddlers' (21-months) and children's (7-years) UPF intake across several household and neighbourhood indicators. Secondary analysis of data from a prospective longitudinal cohort study using parent-report sociodemographic data and 3-day diet diaries. /setting: Participants were children from the UK Gemini study of n=4,804 twins born in 2007. At 21-months and 7-years, n=2,591 and n=592 children had at least 2-days of dietary data, respectively. Percentage energy from UPF at 21-months and 7-years-of-age, classified using the NOVA system. Unadjusted linear regression models were run for household socioeconomic position (SEP) composite score, Index of multiple deprivation decile, income, occupation level, mother's age, education of mother and partner, child's ethnicity, sex, and age. Adjusted multivariable linear regression models were adjusted for ethnicity and all SEP indicators except SEP composite score (Adjusted 1), in addition to child sex and age (Adjusted 2). Missing data were addressed with multiple imputation and inverse probability weighting. Confidence intervals and P-values were adjusted to account for clustering within families. Children of lower SEP had higher UPF intake across several indicators. Mother's education was the strongest predictor, with postgraduate education associated with 8.64% (95% CI -12.08 to -5.20; P<0.001) and 10.12% (95% CI -15.68 to -4.56; P<0.001) less energy from UPF at 21-months and 7-years, respectively, compared to no educational qualifications in Adjusted model 2. UK children from more disadvantaged backgrounds consumed a greater proportion of their energy from UPF. Mother's education seemed the most influential factor. Socioeconomic inequalities, particularly in maternal education, may drive disparities in diet quality and associated health outcomes. Addressing these gaps is essential to reduce childhood obesity and improve long-term health in socioeconomically disadvantaged populations.
Read full abstract