Mestrado em Nutrição e Saúde

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Navegando Mestrado em Nutrição e Saúde por Assunto "Adolescente"

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    Associação entre composição corporal, estágio puberal, hábitos de vida e dislipidemia em crianças e adolescentes
    (Universidade Federal do Espírito Santo, 2017-07-25) Oliosa, Polyana Romano; Barbosa, Miriam Carmo Rodrigues; Mill, José Geraldo; Faria, Carolina Perim de; Kuschnir, Maria Cristina Caetano
    Objective: To analyze the lipid profile of children and adolescents in the age group of 6 to 18 years incomplete and its relation with nutritional status, body composition, life habits, puberty and to verify the impact of body fat accumulation on plasma lipids in boys and girls. Methods: We studied 854 schoolchildren of both sexes. The anthropometric variables analyzed were waist circumference (WC), height, weight, percentage of body fat (% G), body mass index (BMI) and waist circumference by height (RCE). Total cholesterol (TC), high density lipoprotein (HDLc), low density lipoprotein (LDLc) and non-HDL cholesterol (Non-HDLc) were measured in blood. Age was stratified in 6┣ 9 years, 9┣ 15 years and 15┣ 19 years, and the pubertal stages classified according to the Tanner scale in 1 (pre-pubertal), 2 to 4 (puberal) and 5 (post-puberal). Descriptive data were analyzed using the chi-square test, continuous variables presented by mean ± standard deviation and percentages. The analyzes were done by T-Student, ANOVA (followed by Tukey's test) and linear regression. The significance was set at p <0.05. Results: The sample consisted of 56% (n = 478) of boys. The prevailing age was 9 to 15 years (n = 584, 68.4%) with a mean of 11.87 ± 2.8 years. When analyzed the variables of life habits, the male practiced more physical activity, both inside and outside the "Estação Conhecimento" (p = 0.000) and had the habit of feeding with parents and / or guardians, more frequent (p = 0.002 ). There was no difference between the sexes for screen time (p = 0.270), leisure (p = 0.887) and breakfast (p = 0.286). When checking the influence of these variables on the lipid fractions, we did not obtain association (p> 0.05). Overweight was observed in 28.2% of the girls and in 20.3% of the boys (p <0.05). The boys classified in the pubertal and post-pubertal stages had lower (p <0.01) CT, LDLc and non-HDLc concentrations than pre-pubertals. Adolescents aged 15 to 19 years incomplete had lower concentrations of lipid fractions than those aged 6 to 9 years, 9 to 15 years (p <0.01). The mean levels of TC, LDLc and HDLc were higher in girls, however, with no difference between sexes when stratified by pubertal stages (p = 0.093) and age (p = 0.797). Plasma lipid levels change markedly during the pubertal stages. Obese boys had higher CT, non-HDLc and LDLc than eutrophic, whereas in non-HDLc only girls had significance (p <0.05). Boys and girls with inadequate% G and RCE had a higher concentration of LDLc and non-HDLc (p <0.001) when compared to children who had% G and an appropriate RCE. The% G and RCE were positively associated with lipid fractions (CT and non-HDLc) in both genders (p <0.001). The percentage of high body fat contributed with 21% of children or adolescents having high cholesterol (≥170 mg / dL). Conclusion: The nutritional status and excess body fat, are positively associated with the atherogenic lipid profile, impacting with more evidence in the male sex. There was no increase in cholesterol with age, but decreases as age advances as well as with pubertal stages, lipid fractions also decrease. As for the association between life habits and lipid fractions, no feasible associations were found. Thus, the data emphasize the need to control body weight, especially a monitoring of the body composition of children and adolescents aiming at the prevention of cardiovascular diseases in adult life.
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    Comparação entre os fatores associados à resistência à insulina no final da infância e início da adolescência
    (Universidade Federal do Espírito Santo, 2017-07-28) Pani, Virgilia Oliveira; Barbosa, Miriam Carmo Rodrigues; Faria, Eliane Rodrigues de; Mill, José Geraldo; Alvim, Rafael de Oliveira
    The objective of this study was to compare the risk factors associated with the development of insulin resistance (IR) at the end of childhood (8-9 years) and beginning of adolescence (10-14 years) in children and adolescents in the city of Vitória-ES. It is a cross-sectional study with 296 children and adolescents aged 8 to 14 years of public schools in Vitória / ES. Fasting plasma glucose, plasma insulin, total cholesterol and fractions (HDL and LDL), plasma triglycerides (TG), uric acid (AU), C-reactive protein and total leukocytes were determined. IR was assessed by calculating the HOMA-IR index. Measurements of weight, height, waist circumference (WC), perimeter of the neck (PN), perimeter of the hip (PH) and percentage of body fat (%BF) were obtained. Socioeconomic conditions, physical activity practice, eating habits, smoking and alcohol consumption were evaluated. We used the Shapiro Willk normality test, non-parametric tests and simple and multiple logistic regression models. The project was approved by the Human Research Ethics Committee of the Federal University of Espírito Santo (opinion n°. 1.565.490). Of the participants, 54.4% were female and 53.7% were adolescents. The female sex and the adolescence presented greater chances of inadequacy of insulin and IR. Adolescence presented a greater chance of inadequate number of meals, tablet or cellular use, screen time and alcohol consumption. All the anthropometric variables, time on the tablet or cell, time watching television (TV) and total screen time correlated positively with insulin and HOMA-IR. The IR group presented higher values of all the anthropometric variables and most of the biochemical and lifestyle variables, as well as the higher HOMA-IR quartile. Individuals who presented overweight, inadequate WC, PH, PN, Waist / Stature Relationship, excess body fat, inadequate glucose, HDL, TG, TG/HDL ratio, uric acid, insulin, metabolic syndrome, TV, longer screen time, greater family availability of sugar and individuals whose father does not work out were more likely to have IR. In the final model, the excess body fat, the TV watching time above 2h/day and the father did not work out were related to IR in the total sample. In childhood, the TG/HDL ratio ≥p90, AU ≥p90 and the TV watching time was higher than 2h/day and in adolescence the excess body fat, the TV watching time was higher than 2h/day and the family received a government appeal. It was concluded that the risk factors related to IR after 12 adjustments demonstrated different behaviors in the phases evaluated. In this way, it is extremely important to consider the phases separately when evaluating them.