Abstract
BackgroundChildren of low socioeconomic position (SEP) generally have poorer diets than children of high SEP. However there is no consensus on which SEP variable is most indicative of SEP differences in children’s diets. This study investigated associations between diet and various SEP indicators among children aged 9–13 years.MethodFamilies (n = 625) were recruited from 27 Adelaide primary schools in 2010. Children completed semi-quantitative food frequency questionnaires providing intake scores for fruit, vegetables, non-core foods, sweetened drinks, and healthy and unhealthy eating behaviours. Parents reported demographic information by telephone interview. Differences in dietary intake scores were compared across parental education, income, occupation, employment status and home postcode.ResultsAcross most SEP indicators, lower SEP was associated with poorer dietary outcomes, including higher intake of non-core foods and sweetened drinks, and more unhealthy behaviours; and lower intake of fruit and vegetables, and fewer healthy behaviours. The number and type of significant SEP-diet associations differed across SEP indicators and dietary outcomes. Mother’s education appeared most frequently as a predictor of children’s dietary intake, and postcode was the least frequent predictor of children’s dietary intake.ConclusionSocioeconomic gradients in children’s dietary intake varied according to the SEP indicator used, suggesting indicator-specific pathways of influence on children’s dietary intake. Researchers should consider multiple indicators when defining SEP in relation to children’s eating.
Highlights
Children of low socioeconomic position (SEP) generally have poorer diets than children of high SEP
Across most SEP indicators, lower SEP was associated with poorer dietary outcomes, including higher intake of non-core foods and sweetened drinks, and more unhealthy behaviours; and lower intake of fruit and vegetables, and fewer healthy behaviours
The number and type of significant SEP-diet associations differed across SEP indicators and dietary outcomes
Summary
Children of low socioeconomic position (SEP) generally have poorer diets than children of high SEP. A relatively consistent body of literature shows that children and adolescents of low socioeconomic position (SEP) are at risk of consuming poorer diets, due to lower fruit and vegetable consumption [1,2,3], and higher intake of snack foods, fast foods and sweetened beverages [3,4,5] These types of dietary patterns may contribute to higher energy and fat intake among children of low SEP [6], higher obesity rates [7], and higher rates of cardiovascular disease in later life [8]. Most studies define SEP using one socioeconomic indicator (for example, [13,18,19]), SEP is the product of a number of social and economic factors [20], and several indicators may be needed to more confidently characterise SEP disparities in children’s dietary intake [21]
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