S A Blondin1, S Anzman-Frasca, H C Djang2, C D Economos2. 1. Friedman School of Nutrition Science and Policy, ChildObesity180, Tufts University, Boston, USA. stacy.blondin@tufts.edu. 2. Friedman School of Nutrition Science and Policy, ChildObesity180, Tufts University, Boston, USA.
Abstract
BACKGROUND: Breakfast consumption has been associated with reduced risk of overweight and obesity among children, but previous evidence reviews fail to confirm a causal relationship. OBJECTIVES: To review recent literature on breakfast consumption and adiposity among children and discuss potential underlying mechanisms. METHODS: A comprehensive literature search of studies published since the 2010 US National Evidence Library review (January 2010-January 2015) was conducted. RESULTS: Twelve studies met inclusion criteria. All were conducted in industrialized countries: six in Europe, four in the USA, one in China and one in Australia. Ten of the studies used observational longitudinal designs, with follow-up periods ranging from 1 to 27 years (median: 3, mean: 7.4); of these, eight reported inverse associations between breakfast consumption and excess adiposity, while two found no association. The other studies (1 case-control, 1 experimental) each reported a protective effect of breakfast consumption on overweight and obesity among children. CONCLUSIONS: Findings corroborate results from previous reviews, adding support for a possible, protective role for breakfast consumption in preventing excess adiposity during childhood and adolescence. However, drawing a causal conclusion from the collective evidence is curtailed by methodological limitations and inconsistencies, including study design, follow-up duration and frequency, exposure and outcome assessment, as well as limited consideration of confounding, mediating and effect-modifying variables. More rigorous study designs employing valid and standardized measurement of relevant variables are needed.
BACKGROUND: Breakfast consumption has been associated with reduced risk of overweight and obesity among children, but previous evidence reviews fail to confirm a causal relationship. OBJECTIVES: To review recent literature on breakfast consumption and adiposity among children and discuss potential underlying mechanisms. METHODS: A comprehensive literature search of studies published since the 2010 US National Evidence Library review (January 2010-January 2015) was conducted. RESULTS: Twelve studies met inclusion criteria. All were conducted in industrialized countries: six in Europe, four in the USA, one in China and one in Australia. Ten of the studies used observational longitudinal designs, with follow-up periods ranging from 1 to 27 years (median: 3, mean: 7.4); of these, eight reported inverse associations between breakfast consumption and excess adiposity, while two found no association. The other studies (1 case-control, 1 experimental) each reported a protective effect of breakfast consumption on overweight and obesity among children. CONCLUSIONS: Findings corroborate results from previous reviews, adding support for a possible, protective role for breakfast consumption in preventing excess adiposity during childhood and adolescence. However, drawing a causal conclusion from the collective evidence is curtailed by methodological limitations and inconsistencies, including study design, follow-up duration and frequency, exposure and outcome assessment, as well as limited consideration of confounding, mediating and effect-modifying variables. More rigorous study designs employing valid and standardized measurement of relevant variables are needed.
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