Low intake of dietary fibre among Brazilian adolescents and association with nutritional status: cross-sectional analysis of Study of Cardiovascular Risks in Adolescents data

摘要

Objective: To evaluate dietary fibre intake in Brazilian adolescents and its association with nutritional status. Design: This was a cross-sectional study including data from the Brazilian multicentre Study of Cardiovascular Risks in Adolescents (ERICA). Data analysed were geographic region, sex, age, nutritional status, sexual maturation stage, socioeconomic status, school type and level of physical activity. For nutritional status classification, BMI/age was used by sex. Dietary intake was assessed by 24-h recall. Dietary fibre intake was expressed in g/d, and adequacy was determined using dietary reference intake (DRI) values. Complex sample design was considered in statistical analysis, and logistic regression was used to estimate OR for fibre intake and nutritional status. Setting: Brazilian municipalities with more than 100 000 inhabitants. Participants: A total of 71 740 adolescents aged 12-17 years were included. Results: The average total dietary fibre intake was 19 center dot 1 g/d (95 % CI 18 center dot 5, 19 center dot 7), and only 13 center dot 1 % (95 % CI 11 center dot 6, 14 center dot 7) of Brazilian adolescents reached the recommendations. The results of logistic regression analysis adjusted for geographic region, sex and type of school showed that overweight and obese adolescents were 1 center dot 6 and 1 center dot 8 times more likely, respectively, to have inadequate dietary fibre intake (P< 0 center dot 0001). Conclusions: Brazilian adolescents had a significantly inadequate dietary fibre intake. This was particularly notable in adolescents with excess weight. Education policies on nutrition must be implemented, as dietary fibre plays an important role in the prevention and treatment of obesity and other chronic diseases.