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Associations between restrictive feeding practices and children's dietary intake: Systematic review and meta-analyses
Lilly M Werner1, Kimberley M Mallan2
1School of Behavioural and Health Sciences, Melbourne, Australian Catholic University, Australia.
Background:
Parents' attempt to limit or restrict children's intake of 'unhealthy' or discretionary foods has been widely considered as a counterproductive feeding practice associated with poorer dietary outcomes, but empirical evidence is varied.
Aim:
The present systematic literature review aimed to investigate the association between parental restriction and children's dietary intake.
Method:
Studies were identified through PsycInfo, MEDLINE, CINAHL, Web of Science, and Scopus databases on April 29th, 2022. Included were peer-reviewed, English-language articles published between 2001 and 2022, with an effect size between restriction and children's intake of foods that are 'healthy' (i.e., fruit, vegetables, other general healthy foods) or 'discretionary' (i.e., sweet or savoury energy-dense/nutrient poor foods, high-sugar foods, high-salt/fat foods, and high-energy/sugar-sweetened beverages), or overall diet quality. Risk of bias was assessed using a quality assessment checklist designed to evaluate survey studies.
Results:
Included studies (n = 44) were most often conducted in the USA, cross-sectional, and participants were mothers. Effect sizes (k = 59) from 21 studies were used in nine meta-analyses investigating various healthy and discretionary dietary intake variables. No meta-analytic effects were statistically significant. Qualitative synthesis of effect sizes ineligible for meta-analysis (k = 91) identified patterns of associations between restriction and increased intake of healthy foods, and decreased intake of discretionary foods.
Conclusions:
Studies used a diverse selection of measures of restriction and dietary intake, limiting the ability of this review to make accurate cross-study comparisons. However, results suggest that instead of restriction being detrimental for children's dietary outcomes, it may be unrelated, or associated with more beneficial dietary outcomes. Research that utilises validated measures of restriction and dietary outcomes and a longitudinal design is needed to clarify this association.
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