摘要
Background: A socioeconomic gradient in childhood obesity is known to be prese nt by the age of school entry in the UK. The origin of this gradient is unclear at present, but must lie in socioeconomic differences in habitual physical activ ity, sedentary behaviour, or dietary intake. Aims: To test the hypothesis that h abitual physical activity and/or sedentary behaviour are associated with socioec onomic status (SES) in young Scottish children. Methods: Observational study of 339 children (mean age 4.2 years, SD 0.3) in which habitual physical activity an d sedentary behaviour were measured by accelerometry over six days (study 1). In a second study, 39 pairs of children of distinctly different SES (mean age 5.6 years, SD 0.3) were tested for differences in habitual physical activity and sed entary behaviour by accelerometry over seven days. Results: In study 1, SES was not a significant factor in explaining the amount of time spent in physical acti vity or sedentary behaviour once gender and month of measurement were taken into account. In study 2, there were no significant differences in time spent in phy sical activity or sedentary behaviour between affluent and deprived groups. Conclusion: Results do not support the hypothesis that low SES in young Scotti sh children is associated with lower habitual physical activity or higher engage ment in sedentary behaviour.
Background： A socioeconomic gradient in childhood obesity is known to be present by the age of school entry in the UK. The origin of this gradient is unclear at present, but must lie in socioeconomic differences in habitual physical activity, sedentary behaviour, or dietary intake. Aims： To test the hypothesis that habitual physical activity and/or sedentary behaviour are associated with socioeconomic status （SES） in young Scottish children.
