Résumé :
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[BDSP. Notice produite par INIST-CNRS lR0xnEmG. Diffusion soumise à autorisation]. The authors prospectively examined whether change in dietary glycemic index (Gl), glycemic load (GL), fiber intake, or whole-grain intake during puberty is associated with concurrent change in percentage of body fat (% BF) or body mass index (BMI ; weight (kg)/height) 2. Linear mixed-effects regression analyses were performed in 215 participants from the Dortmund Nutritional and Anthropometric Longitudinally Designed (DONALD) Study (Dortmund, Germany) who possessed weighed 3-day dietary records and anthropometric data at puberty onset (defined by age at takeoff) and over the subsequent 4 years (1988-2007). Neither changes in dietary Gl, GL, fiber intake, nor whole-grain intake were associated with concurrent changes in% BF throughout puberty (change in% BF : - 0.03 (standard error (SE), 0.11) per standard deviation (SD) increase in Gl (P=0.8) ; - 0.01 (SE, 0.11) per SD increase in GL (P=0.9) ; 0.02 (SE, 0.14) per SD increase in fiber intake (P=0.9) ; and 0.09 (SE, 0.13) per SD increase in whole-grain intake (P=0.5)). Similarly, no concurrent associations were observed between these dietary factors and BMI SD scores. Associations of dietary Gl with% BF and BMI SD score differed between overweight and normal-weight adolescents (for concurrent association, Pfor interaction was 0.03 for% BF and 0.08 for BMI SD score). Dietary Gl, GL, and fiber and whole-grain intakes in healthy, free-living adolescents do not appear to be relevant to the development of% BF or BMI during puberty.
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