• Nutrition · Mar 2022

    The relationship between diet and sleep in 2-y-old children: Results from Growing Up in New Zealand.

    • Alejandra Ríos-Hernández, Catherine Gilchrist, Carol Chelimo, Teresa Gontijo Castro, Maria Izquierdo-Pulido, Clare Wall, Hiran Thabrew, Sarah Berry, Susan Morton, and Cameron Grant.
    • Department of Nutrition, Food Science and Gastronomy, The University of Barcelona, Spain.
    • Nutrition. 2022 Mar 1; 95: 111560.

    ObjectivesThis study aimed to examine the relationship between dietary practices and sleep in young children.MethodsIn this study, 2-y-old children (n = 6327) and their mothers were enrolled at birth and during pregnancy, respectively. The study obtained maternal demographic, health, and lifestyle data during late pregnancy. Parents reported the 2-y-old child's dietary practices on a food frequency questionnaire, as well as sleep duration and night-waking frequency. Measures of dietary intake quantified servings per day for each food group (grouped as low/moderate/high intake). Sleep measures were as inadequate sleep when <11 h sleep in a 24-h period and increased night waking when waking ≥2 times per night. Multivariable logistic regression analyses examined associations between toddler diet and sleep, which were described using adjusted odds ratios (ORs) and 95% confidence intervals.ResultsIn this study, 2-y-old children (n = 6288) slept for a mean of 12.3 hours (standard deviation: ±1.5 hours) over a 24-h period, with 734 children (12%) getting <11 h of sleep in 24 h. Increased night waking occurred in 1063 children (17%). Compared with low intake, high soft drink/snack/fast food intake was associated with inadequate sleep (OR: 1.37) and increased night waking (OR: 1.34). High milk/cheese/yoghurt intake (OR: 1.55) was associated with increased odds of night waking, but moderate (OR: 0.81) or high (OR: 0.78) vegetable intake was associated with decreased odds of night waking. Exposure to screens (OR: 1.28) and heavy maternal cigarette smoking (OR: 2.20) were also associated with inadequate sleep and increased night waking, respectively.ConclusionsAt age 2 y, higher consumption of soft drinks/snacks/fast foods is associated with shorter, more disrupted sleep. Conversely, higher vegetable consumption is associated with less disrupted sleep. Dietary modifications may improve toddlers' sleep.Copyright © 2021 Elsevier Inc. All rights reserved.

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