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Citation

Rae DE, Tomaz SA, Jones RA, Hinkley T, Twine R, Kahn K, Norris SA & Draper CE (2021) Sleep and BMI in South African urban and rural, high and low-income preschool children. BMC Public Health, 21. https://doi.org/10.1186/s12889-021-10591-5

Abstract
Background The extent to which income setting or rural and urban environments modify the association between sleep and obesity in young children is unclear. The aims of this cross-sectional observational study were to (i) describe and compare sleep in South African preschool children from rural low-income (RL), urban low-income (UL) and urban high-income (UH) settings; and (ii) test for associations between sleep parameters and body mass index (BMI). Methods Participants were preschoolers (5.2?±?0.7y, 49.5% boys) from RL (n?=?111), UL (n?=?65) and UH (n?=?22) settings. Height and weight were measured. Sleep, sedentary behaviour and physical activity were assessed using accelerometery. Results UL children had higher BMI z-scores (median: 0.39; interquartile range: ??0.27, 0.99) than the UH (??0.38; ??0.88, 0.11) and RL (??0.08; ??0.83, 0.53) children (p?=?0.001). The UL children had later bedtimes (p?

Keywords
Sleep; Adiposity; Early childhood; Low-and middle-income country

Journal
BMC Public Health: Volume 21

• Sleep And BMI In South African Urban And Rural Hig