Prevalência de sobrepeso e obesidade em crianças e adolescentes brasileiros: revisão sistemática e metanálise

Overweight/obesity and dental caries in Brazilian children and adolescents: a systematic review and meta-analysis

This review aimed to assess the association between overweight/obesity and dental caries in Brazilian children/adolescents. Searches were performed in the Web of Science, Scopus, Cochrane, PubMed, Embase and SciELO, Lilacs and Open Grey literature databases up to June 2022. The Joanna Briggs Institute checklist for analytical cross-sectional studies, the checklist for cohort studies, and the checklist for case-control studies were used. A total of 41 publications were included, and 15 meta-analyses were performed. The authors analyzed the differences in weighted mean difference (MD) and odds ratios (OR), and their corresponding confidence intervals (CI) (95%) for dental caries among eutrophic and obese and/or overweight children/adolescents. Meta-analyses showed that there was no association between overweight and/or obesity and dental caries in Brazilian children/adolescents for most anthropometric reference curves using BMI (Body Mass Index). A greater experience of dental caries was associated with well-nourished adolescents in permanent dentition, compared with obese individuals in the same dentition, as classified by the CDC 2000 curve (OR = 2.53, 95% CI;1.49-4.29; p = 0.0006; I2 = 0%) in dichotomous outcome studies, and (MD = 0.61, 95%CI: 0.08-1.15; p = 0.02; I2 = 0%) in continuous studies. The strength of the evidence of the results was classified as very low, low or moderate. It was concluded that there is no association between overweight and/or obesity and dental caries in Brazilian children/adolescents for most anthropometric reference curves using BMI. A greater experience of dental caries was associated with well-nourished adolescents in permanent dentition, compared with obese individuals in the same dentition, as classified by the CDC 2000 curve.

Frequency of breakfast consumption and its associations with food consumption by degree of industrial processing and with indicators of overweight in Brazilian adolescents (EVA-JF Study)

OBJECTIVE

The aim of this study was to investigate the frequency of breakfast consumption and estimate its associations with the consumption of food at different degrees of industrial processing and with overweight indicators in Brazilian adolescents.

METHODS

This cross-sectional study involved a probabilistic sample of 14- to 19-y-old adolescents enrolled in 29 public schools in the municipality of Juiz de Fora, MG, Southeast Brazil (n = 805). The frequency of breakfast consumption was evaluated via a questionnaire (classified into "do not consume", "sometimes consume", and "regularly consume"). The evaluation of food consumption involved two 24-h dietary recalls, the items of which were analyzed according to the NOVA classification system. Overweight indicators (waist circumference, body mass index for age (BMI-for-age), and body fat percentage) were evaluated according to a standard protocol. Linear regression models were performed, first without and then with adjustments for sociodemographic characteristics.

RESULTS

We found that 20% of adolescents skipped breakfast, and ∼46% of the caloric intake came from ultra-processed foods. Breakfast omission was associated with a mean increase of 3.02% (95% confidence interval [CI], 0.52-5.53) in energy intake from ultra-processed foods, in addition to a mean increase of 0.28 z-score (95% CI, 0.05- 0.52) of BMI-for-age and of 1.64% (95% CI, 0.21-3.08) in body fat.

CONCLUSIONS

We verified that the omission of breakfast was associated with higher consumption of ultra-processed foods, as well as a higher BMI-for-age and higher percentage of body fat, reinforcing the importance of actions to encourage the consumption of this meal and the adoption of healthy eating practices in adolescents.

Individual and Socioeconomic Contextual Factors Associated with Obesity in Brazilian Adolescents: VigiNUTRI Brasil

This study investigated the association of socioeconomic contextual factors of the municipality of residence of adolescents, their eating behavior and food consumption with the prevalence of obesity. This was a cross-sectional study, based on individual data regarding anthropometry, eating behavior (eating in front of screens and having at least three main meals a day), and markers of healthy and unhealthy eating of 23,509 adolescents aged 10 to 19 years, participating in the Food and Nutrition Surveillance of the Brazilian Population monitored in Primary Health Care (VigiNUTRI Brasil) assessment in 2018. Based on multilevel Poisson regression, a higher prevalence of obesity was observed among adolescents living in municipalities with per capita income above USD209.68 (PR = 1.22; 95% CI 1.05;1.42) and among those who consumed hamburgers and/or processed meats the previous day (PR = 1.09; 95% CI 1.01;1.17). Adolescents who had the habit of having three main meals a day (PR = 0.81; 95% CI 0.73;0.89 p < 0.05) and who consumed fresh fruit the previous day (PR = 0.91; 95% CI 0.84;0.98 p < 0.001) had lower prevalence of obesity. The results reinforce the influence of the social context and food consumption on obesity rates. The persistence of this situation implies a worsening in the current and future health of adolescents.

Consumption of Ultra-Processed Foods in Brazilian Children: An Analysis of Regional Trends

PURPOSE

Childhood obesity has become a concern for the Brazilian Unified Health System, which has recently started to investigate children's eating habits in basic health units. This study examined the trends and ultra-processed foods (UPF) consumption in Brazilian children.

DESIGN AND METHODS

This repeated cross-sectional study included 492,630 children (2-9 years old), from different Brazilian regions, in the years 2015 and 2019. The children's food consumption was assessed by nurses using a nationally standardized instrument. Information was provided by the Food and Nutrition Surveillance System Brazilian.

RESULTS

The UPF consumption in Brazilian children is generally high and was higher among children in the South and Midwest regions. The consumption of sweetened beverages was more prevalent among all the UPF assessed and continues to increase among children in the Northeast region. Declining trends in UPF consumption were observed in children from all regions, except for the Northeast region, whose trends increased in almost all evaluated foods.

PRACTICE IMPLICATIONS

Nurses, especially, have a primary role in guiding the reduction of UPF consumption, as they are the first health professionals to have access to this information. Increasing trends in UPF consumption can be mitigated by the inclusion of nutritionists in basic health units. Brazilian children need to be assisted by public policies that promote food education.