Resumo Objetivou-se verificar a prevalência da autopercepção de saúde em adolescentes e fatores sociodemográficos, comportamentais e aspectos de saúde associados durante a pandemia da COVID-19. De delineamento transversal, uma amostra de adolescentes, responderam de forma online o Questionário de Comportamento do Adolescente Catarinense e o Inventário de Depressão de Beck-Segunda Edição. Para comparar proporções utilizou-se o teste Qui-quadrado (χ2) e para encontrar os fatores associados a autopercepção de saúde a Regressão de Poisson. Realizou-se as análises no software SPSS. Participaram 157 adolescentes, a maioria do sexo feminino (66,7%), com média de idade 15,91 anos (DP=0,8). A sintomatologia depressiva foi encontrada em 55,8% dos adolescentes, a prevalência em meninas foi significativamente superior à prevalência nos meninos (65,7% vs 36,5%, p<0,05). Houve prevalência de 66,0% de autopercepção de saúde positiva em adolescentes. Adolescentes que dormiam bem às vezes (RP= 2,8; IC95%: 1,5 - 5,3), quase nunca ou nunca (RP= 3,6; IC95%:1,9 - 7,0; p=0,001) apresentaram maior razão de prevalência da autopercepção de saúde negativa quando comparadas aos adolescentes que dormiam bem sempre ou quase sempre. Adolescentes que possuíam sintomatologia depressiva apresentaram razão de prevalência (RP= 1,9; IC95%:1,0 - 3,5; p=0,024) maior de autopercepção de saúde negativa quando comparadas aos adolescentes sem sintomatologia depressiva. Conclui-se que a autopercepção de saúde associou-se ao sono e sintomatologia depressiva em adolescentes.

Abstract The objective was to verify the prevalence of self-perceived health in adolescents and sociodemographic, behavioral factors and associated health aspects during the COVID-19 pandemic. Using cross-sectional design, a sample of adolescents answered the Adolescent Behavior Questionnaire of Santa Catarina and the Beck Depression Inventory-Second Edition online. To compare proportions, the Chi-square test (χ2) was used and to find the factors associated with self-perception of health, the Poisson Regression. Analyzes were performed in SPSS software. A total of 157 adolescents participated, most of them female (66.7%), with mean age of 15.91 years (SD=0.8). Depressive symptoms were found in 55.8% of the adolescents, the prevalence in girls was significantly higher than in the boys (65.7% vs 36.5%, p<0.05). There was a prevalence of 66.0% of positive self-perception of health in adolescents. Adolescents who slept well sometimes (PR= 2.8, 95%CI:1.5 - 5.3), almost never or never (PR=3.6, 95%CI:1.9 - 7.0, p=0.001) had a higher prevalence ratio of negative self-perception of health when compared to adolescents who always or almost always slept well. Adolescents who had depressive symptoms had a higher prevalence ratio (PR= 1.9, 95%CI:1.0 - 3.5, p=0.024) of negative self-perception when compared to adolescents without depressive symptoms It was concluded that self-perception of health was associated with sleep and depressive symptoms in adolescents.

Abstract High exposure to sedentary behavior and lower levels of physical activity can lead to excess body weight (EBW). The aim of this study was to estimate the prevalence of EBW and the direct association under the condition of sociodemographic, university, and behavioral moderating characteristics, between physical activity and sitting time related to EBW in Brazilian university students. A cross-sectional study was carried out with 1,110 university students from a federal public institution in Minas Gerais, Brazil. The outcome was the EBW (body mass index: ≥25.0 kg/m2) and the independent variables were physical activity (insufficiently active and active) and sitting time (<6 h/day; ≥6 h/day). Association analyses were estimated via odds ratio (OR) using binary logistic regression. The significance level was 5%. The prevalence of EBW was 27.8%. No direct association was observed between physical activity and time sitting related to EBW. However, insufficiently active university students were more likely to have EBW (OR = 1.91; 95% CI: 1.06-3.47) when they did not consume alcoholic beverages, and university students with a sitting time of ≥6 h/day had lower chances of having EBW (OR = 0.62; 95% CI: 0.40-0.95) when they had spent more time at university (3 years or more). It is concluded that the prevalence of EBW in university students was high and there was no direct association between physical activity and sitting time; however, alcohol consumption and university time moderated the association with higher and lower chances of occurrence of EBW in university students, respectively.

Resumo A elevada exposição ao comportamento sedentário e menores níveis de atividades físicas podem acarretar o excesso de peso corporal (EPC). Os objetivos deste estudo foram estimar a prevalência de EPC e a associação direta e sob a condição das características moderadoras sociodemográficas, de vínculo com a universidade e comportamentais, entre a atividade física e o tempo sentado em relação ao EPC em universitários brasileiros. Realizou-se um estudo transversal com 1.110 universitários de uma instituição pública federal de Minas Gerais, Brasil. O desfecho foi o EPC (índice de massa corporal: ≥25,0 kg/m2) e as variáveis independentes foram a atividade física (insuficientemente ativos e ativos) e o tempo sentado (<6 horas/dia; ≥6 horas/dia). As análises de associação foram estimadas via Odds Ratio (OR) por meio da Regressão Logística Binária. O nível de significância foi de 5%. A prevalência de EPC foi de 27,8%. Não foi observada associação direta entre a atividade física e tempo sentado sob o EPC. No entanto, os universitários insuficientemente ativos apresentaram maiores chances de EPC (OR = 1,91; IC95%: 1,06 - 3,47), quando não consumiam bebida alcoólica e os universitários com tempo sentado ≥6 horas/dia apresentaram menores chances de EPC (OR = 0,62; IC95%: 0,40 - 0,95), quando apresentaram maior tempo de universidade (3 anos ou mais). Conclui-se que a prevalência de EPC em universitários foi elevada e não houve associação direta entre a atividade física e o tempo sentado em relação ao EPC, porém, o consumo de álcool e o tempo de universidade moderaram a associação com maiores e menores chances da ocorrência de EPC em universitários, respectivamente.

Abstract The objective was to systematically search and synthesize the evidence available in the literature about the effect of physical exercise interventions Primary Health Care (PHC), carried out in Brazil, on cardiometabolic risk factors. The search was performed in the PubMed, Virtual Health Library and Web of Science databases. The inclusion criteria were: studies with physical activity (PA) interventions or exercise in PHC; carried out in Brazil; population aged >18 years; at least one cardiometabolic risk factor assessed pre and post-intervention. The “Health Sciences Descriptors” were used to define the search descriptors: “physical activity” OR “exercise” OR “motor activity” AND “primary health care” OR “health centers” OR “primary care” AND “Brazil”. The selection phases were performed by pairs of blinded researchers and the conflicts were decided by a third evaluator. Jadad scale was used to assess the methodological quality of the articles included. In total, 1,817 articles were found and 26 duplicates excluded, leaving 1,791 for reading of titles. The abstracts of 105 articles were read, and 53 articles were read in full. Finally, 06 articles were considered eligible and included in the review. The cardiometabolic risk factors evaluated in the included studies were body mass index (4 studies), waist-hip ratio (1 study), fat percentage (1 study), blood pressure (2 studies), lipid profile (1 study), inflammatory profile (1 study), and aerobic capacity (3 studies). It is concluded that there is insufficient evidence in the literature about the effect of exercise interventions in PHC with a focus on cardiometabolic risk factors.

Resumo O objetivo foi buscar sistematicamente e sintetizar as evidências disponíveis na literatura acerca do efeito de intervenções com exercício físico na Atenção Primária à Saúde (APS), realizadas no Brasil, sobre os fatores de risco cardiometabólicos. A busca sistemática foi realizada nas bases de dados PubMed, Biblioteca Virtual em Saúde e Web of Science. Foram incluídos estudos com intervenção de AF ou exercício na APS; realizadas no Brasil; com população >18 anos de idade; pelo menos um fator de risco cardiometabólico avaliado pré e pós intervenção. Utilizou-se o Descritores em Ciências da Saúde para definir os descritores de busca: “physical activity” OR “exercise” OR “motor activity” AND “primary health care” OR “health centers” OR “primary care” AND “Brazil”. As fases de seleção foram realizadas por pares e com cegamento e os conflitos decididos por um terceiro avaliador. Utilizou-se a escala de Jadad para avaliar a qualidade metodológica dos artigos incluídos. Foram encontrados 1.817 artigos e excluídas 26 duplicatas, restando 1.791 para leitura dos títulos. Foram lidos 105 resumos e 53 artigos na íntegra. Por fim, 06 artigos foram considerados elegíveis e incluídos na revisão. Os fatores de risco cardiometabólicos avaliados nos estudos incluídos foram índice de massa corporal (4 estudos), razão cintura quadril (1 estudo), percentual de gordura (1 estudo), pressão arterial (2 estudos), perfil lipídico (1 estudo), perfil inflamatório (1 estudo) e capacidade aeróbica (3 estudos). Conclui-se que não há evidências suficientes na literatura sobre o efeito das intervenções de exercícios na APS com foco nos fatores de risco cardiometabólicos.

ABSTRACT The aim of this study was to develop percentiles of body composition indicators and determine cutoff points to predict metabolic syndrome (MS) risk in 6-10-year-old children. This is a cross-sectional, population-based epidemiological study with the participation of 1480 schoolchildren aged 6-10-year. Anthropometric assessment (body mass, height, and skinfolds) and blood pressure measurement were performed in schools. The body mass index (BMI), as well as the body fat percentage (%BF), lean body mass (LBM), fat body mass (FBM), were calculated according to standardized formulas for children. Blood collection to assess the lipid and glycemic profile was also performed at school, on pre-established days and times. The MS diagnosis was determined based on changes in triglycerides, HDL-c, blood glucose, waist circumference, and blood pressure. The LMS method was used to develop the percentiles, the area under the ROC curve (AUC) to identify the accuracy of the indicators, and the sensitivity and specificity to determine the cutoff points. FBM and %BF had significantly higher values in girls, who also had lower values for %LM compared to boys (p<0.05). The indicators of body composition, BMI, FBM, and %BF were accurate in predicting the MS risk for both sex at all ages. The main indicators of body composition to predict the MS risk, in both sex, were BMI, FBM, and %BF. These findings suggest that simple anthropometric measurements, which can be performed in clinical practice, have the potential to direct non-pharmacological actions.

RESUMO Objetivou-se desenvolver percentis de indicadores de composição corporal e determinar pontos de corte para predizer o risco de síndrome metabólica (SM) em crianças de seis a 10 anos de idade. Estudo epidemiológico de corte transversal, de base populacional, com participação de 1480 escolares de seis a 10 anos de idade. A avaliação antropométrica (massa corporal, estatura e dobras cutâneas) e a aferição da pressão arterial foram realizadas nas escolas. O índice de massa corporal (IMC) bem como o percentual de gordura (%GC), percentual de massa magra (%MM), massa corporal gorda (MCG) foram calculados de acordo com fórmulas padronizadas para crianças. A coleta de sangue para avaliar o perfil lipídico e glicêmico também foi realizada na escola, em dias e horários pré-estabelecidos. O diagnóstico da SM foi determinado com base em alterações nos triglicerídeos, HDL-c, glicemia, perímetro de cintura e pressão arterial. O método LMS foi utilizado para desenvolver os percentis, a área sob a curva ROC (AUC) para identificar a acurácia dos indicadores e a sensibilidade e especificidade para determinar os pontos de corte. MCG e %GC apresentaram valores significativamente superior nas meninas e também valores inferiores para a MCM em relação aos meninos (p<0,05). Os indicadores de composição corporal, IMC, MCG e %GC apresentaram acurácia na predição do risco de SM para ambos os sexos em todas as idades. Os principais indicadores de composição corporal para predição do risco de SM, em ambos os sexos, foram o IMC, %GC e MCG. Esses achados sugerem que medidas antropométricas simples, que podem ser realizadas na prática clínica, tem potencial para direcionar ações não medicamentosas

Resumo Inquéritos de consumo alimentar, atividade física (AF) e comportamento sedentário (CS) constituem instrumentos práticos na identificação de hábitos entre a população pediátrica. No entanto, os resultados de descrição desses comportamentos parecem estar restritos a grandes centros. Objetivou-se analisar consumo alimentar, nível de AF e CS em escolares. Crianças de seis a 10 anos de idade, oriundas de escolas públicas e privadas foram avaliadas quanto à antropometria, padrão dietético, nível de AF e de CS. Um total de 1408 crianças (48,1% do sexo masculino) com média de idade de 8,05 (± 1,53) anos participou do estudo. Apenas 4,6%, 4,9% e 17,2% das crianças atenderam às recomendações de consumo de frutas, leite e derivados e verduras/legumes, respectivamente. Não atenderam a recomendação para consumo de refrigerante e carnes 40,4% e 59,5% das crianças, respectivamente. Mais de 75% das crianças atenderam a recomendação para o consumo de salgadinho de pacote, doces e feijão. Houve diferença entre os sexos somente para o consumo de doces (p=0,003), com maior proporção de meninos a atender as recomendações. Aproximadamente, metade e um terço das crianças atenderam as recomendações para prática de AF de moderada a vigorosa intensidade e de CS, respectivamente. Comportamentos de risco para doenças cardiovasculares foram observados nas crianças, caracterizado pelo baixo consumo de frutas e verduras/legumes, baixos níveis de AF e excessivo tempo em CS.

Abstract Dietary intake inquiry, physical activity (PA) and sedentary behavior (SB) surveys are practical tools for identifying habits among the pediatric population; however, the results of describing these behaviors appear to be restricted to large centers. The objective was to analyze dietary intake, PA and SB level in schoolchildren. Children from 6 to 10 years old, coming from public and private schools were evaluated for anthropometry, dietary pattern, PA and SB level. A total of 1408 children (48.1% male) with a mean age of 8.05 (± 1.53) years participated in the study. Only 4.6%, 4.9% and 17.2% of children met the recommendations for fruit, milk and dairy products, respectively. 40.4% and 59.5% of the children did not meet the recommendation for soft drinks and meat consumption, respectively. More than 75% of children met the recommendation for the consumption of packaged snacks, candies and beans. There was a difference between genders only for candy consumption (p=0.003), with a higher proportion of boys meeting the recommendations. Approximately half and one third of the children complied with the recommendations for moderate to vigorous PA and SB, respectively. Risk behaviors for cardiovascular disease were observed in children, characterized by low consumption of fruits and vegetables, low levels of PA and excessive time in SB.

RESUMO: Objetivo: Determinar o poder preditivo do índice de massa corporal (IMC), perímetro da cintura (PC) e razão da cintura pela estatura (RCEst) e de seus respectivos pontos de corte para triagem de pressão arterial (PA) elevada em crianças e adolescentes brasileiros. Método: Estudo transversal realizado com1.139 escolares de 6 a 17 anos de idade. A massa corporal, a estatura, o PC e a PA foram mensurados. A PA elevada foi classificada como sistólica ou diastólica≥ percentil 95. Curvas Receiver Operating Characteristic (ROC) foram construídas e a área sob a curva, a sensibilidade e a especificidade foram calculadas. Resultados: A prevalência de PA elevada foi de 27,0%. Os indicadores antropométricos apresentaram associação significativa com PA elevada (acurácia variando de 0,62 - 0,81), exceto RCEst entre adolescentes do sexo masculino.Observou-se baixa sensibilidade, independentemente do indicador antropométrico, do sexo e da faixa etária. Conclusão: OIMC, o PC e a RCEst estiveram associados a PA elevada, porém os pontos de corte testados apresentaram baixa sensibilidade. A determinação de pontos de corte específicos para cada população pode viabilizar a triagem de PA elevada por meio de indicadores antropométricos.

ABSTRACT: Objective: To determine the predictive power of body mass index (BMI), waist circumference (WC), and waist-to-height ratio (WHtR), and their respective cut-off points for high blood pressure (BP) screening in Brazilian children and adolescents. Method: Cross-sectional study conducted with 1,139 students aged 6 to 17years. Body weight, height, WC, and BP were measured. High BP was classified as systolic or diastolic ≥ 95th percentile. Receiver Operating Characteristic (ROC) curves were constructed, and the area under the curve, sensitivity, and specificity were calculated. Results: The prevalence of high BP was 27.0%. Anthropometric indices showed a significant association with high BP (accuracy ranging from 0.62 - 0.81), except for WHtR among male adolescents.Sensitivity was low, regardless of the anthropometric index, gender, and age group. Conclusion: BMI, WC, and WHtR were associated with high BP, but the cut-off points tested showed low sensitivity. Determining specific cut-off points for each population can enable the use of anthropometric indices in high BP screening.

RESUMO: Objetivo: Determinar o poder preditivo do índice de massa corporal (IMC), perímetro da cintura (PC) e razão da cintura pela estatura (RCEst) e de seus respectivos pontos de corte para triagem de pressão arterial (PA) elevada em crianças e adolescentes brasileiros. Método: Estudo transversal realizado com1.139 escolares de 6 a 17 anos de idade. A massa corporal, a estatura, o PC e a PA foram mensurados. A PA elevada foi classificada como sistólica ou diastólica≥ percentil 95. Curvas Receiver Operating Characteristic (ROC) foram construídas e a área sob a curva, a sensibilidade e a especificidade foram calculadas. Resultados: A prevalência de PA elevada foi de 27,0%. Os indicadores antropométricos apresentaram associação significativa com PA elevada (acurácia variando de 0,62 - 0,81), exceto RCEst entre adolescentes do sexo masculino.Observou-se baixa sensibilidade, independentemente do indicador antropométrico, do sexo e da faixa etária. Conclusão: OIMC, o PC e a RCEst estiveram associados a PA elevada, porém os pontos de corte testados apresentaram baixa sensibilidade. A determinação de pontos de corte específicos para cada população pode viabilizar a triagem de PA elevada por meio de indicadores antropométricos.

ABSTRACT: Objective: To determine the predictive power of body mass index (BMI), waist circumference (WC), and waist-to-height ratio (WHtR), and their respective cut-off points for high blood pressure (BP) screening in Brazilian children and adolescents. Method: Cross-sectional study conducted with 1,139 students aged 6 to 17years. Body weight, height, WC, and BP were measured. High BP was classified as systolic or diastolic ≥ 95th percentile. Receiver Operating Characteristic (ROC) curves were constructed, and the area under the curve, sensitivity, and specificity were calculated. Results: The prevalence of high BP was 27.0%. Anthropometric indices showed a significant association with high BP (accuracy ranging from 0.62 - 0.81), except for WHtR among male adolescents.Sensitivity was low, regardless of the anthropometric index, gender, and age group. Conclusion: BMI, WC, and WHtR were associated with high BP, but the cut-off points tested showed low sensitivity. Determining specific cut-off points for each population can enable the use of anthropometric indices in high BP screening.

O estudo teve como objetivos desenvolver valores de referência para perímetro de cintura (PC) em crianças brasileiras entre 6 e 10 anos de idade e avaliar o desempenho da PC na predição de fatores de risco cardiovasculares e de síndrome metabólica (SM) em crianças. O estudo epidemiológico transversal de base populacional incluiu 1.397 crianças entre 6 e 10 anos de idade, através de amostragem probabilística em escolas públicas e privadas em Uberaba, Minas Gerais, Brasil. A PC era medida no ponto mais estreito da cintura (PC1) e ao nível do umbigo (PC2). Foram coletadas amostras de sangue e medidas de pressão arterial para determinar o diagnóstico de SM. Os seguintes fatores mostram associação significativa com PC: idade (p = 0,001), ponto anatômico (PC1 vs. PC2, p = 0,001) e interação sexo/ponto anatômico (p = 0,016). O método LMS foi utilizado para desenhar as curvas suavizadas específicas para sexo e idade, dos percentis 5, 10, 25, 50, 75, 90 e 95. A PC mostrou-se acurada para a predição de SM, para todas as idades [área sob a curva ROC (AUC) > 0,79 e p < 0,05], independente de sexo. Conclusão: o estudo apresentou curvas de percentis de PC em dois pontos anatómicos em uma amostra representativa de crianças brasileiras. Além disso, a PC mostrou ser forte preditor de fatores de risco cardiovasculares e SM em crianças.

The goals of this study were to develop reference values for waist circumference (WC) in Brazilian children between 6-10 years old and to evaluate the WC performance in predicting cardiovascular risk factors and metabolic syndrome (MetS) in children. This is a population-based epidemiological cross-sectional study, in which 1,397 children participated, with a 6-10 years old probability sampling and from public and private schools in the city of Uberaba, Minas Gerais State, Brazil. WC was measured at the waist narrowest point (WC1) and at the umbilicus level (WC2). Blood samples and blood pressure were collected to determine the MetS diagnosis. There was a significant effect of age (p = 0.001), anatomical point (WC1 vs. WC2, p = 0.001) and sex-anatomical point interaction (p = 0.016) for WC. Smoothed sex- and age-specific 5th, 10th, 25th, 50th, 75th, 90th and 95th percentile curves of WC1 and WC2 were designed by the LMS method. WC was accurate to predict MetS, for all ages [area under the ROC curve (AUC) > 0.79 and p < 0.05], regardless of sex. This study presented percentile curves for WC at two anatomical points in a representative sample of Brazilian children. Furthermore, WC was shown to be a strong predictor of cardiovascular risk factors and MetS in children.

Los objetivos de este estudio fueron desarrollar valores de referencia para la circunferencia de cintura (WC por sus siglas en inglés), en niños brasileños entre 6-10 años de edad, y evaluar los resultados de WC para predecir factores de riesgo cardiovasculares y síndrome metabólico (MetS) en niños. Se trata de un estudio epidemiológico transversal, basado en población, en el que participaron 1.397 niños, de 6 a 10 años de edad con muestreo probabilístico, procedentes de escuelas públicas y privadas en la ciudad de Uberaba, Minas Gerais, Brasil. WC fue medido en el punto de cintura más estrecho (WC1) y al nivel del ombligo (WC2). Las muestras de sangre y presión arterial se recogieron para determinar el diagnóstico de MetS. Había un significativo efecto de la edad (p = 0.001), punto anatómico (WC1 vs. WC2, p = 0.001) y punto de interacción sexo-anatómico (p = 0.016) para el WC. Sexo uniforme y edad específica 5º, 10º, 25º, 50º, 75º, 90º y 95º curvas de percentil de WC1 y WC2 fueron diseñados mediante el método LMS. WC fue exacto para predecir MetS en todas las edades [área bajo la curva ROC (AUC) > 0.79 y p < 0.05], independientemente del sexo. Conclusión: este estudio presentó un percentil de curvas para WC en dos puntos anatómicos en una muestra representativa de niños brasileños. Asimismo, la WC se mostró como un fuerte predictor de factores de riesgo cardiovasculares y MetS en niños.

O estudo teve como objetivos desenvolver valores de referência para perímetro de cintura (PC) em crianças brasileiras entre 6 e 10 anos de idade e avaliar o desempenho da PC na predição de fatores de risco cardiovasculares e de síndrome metabólica (SM) em crianças. O estudo epidemiológico transversal de base populacional incluiu 1.397 crianças entre 6 e 10 anos de idade, através de amostragem probabilística em escolas públicas e privadas em Uberaba, Minas Gerais, Brasil. A PC era medida no ponto mais estreito da cintura (PC1) e ao nível do umbigo (PC2). Foram coletadas amostras de sangue e medidas de pressão arterial para determinar o diagnóstico de SM. Os seguintes fatores mostram associação significativa com PC: idade (p = 0,001), ponto anatômico (PC1 vs. PC2, p = 0,001) e interação sexo/ponto anatômico (p = 0,016). O método LMS foi utilizado para desenhar as curvas suavizadas específicas para sexo e idade, dos percentis 5, 10, 25, 50, 75, 90 e 95. A PC mostrou-se acurada para a predição de SM, para todas as idades [área sob a curva ROC (AUC) > 0,79 e p < 0,05], independente de sexo. Conclusão: o estudo apresentou curvas de percentis de PC em dois pontos anatómicos em uma amostra representativa de crianças brasileiras. Além disso, a PC mostrou ser forte preditor de fatores de risco cardiovasculares e SM em crianças.

The goals of this study were to develop reference values for waist circumference (WC) in Brazilian children between 6-10 years old and to evaluate the WC performance in predicting cardiovascular risk factors and metabolic syndrome (MetS) in children. This is a population-based epidemiological cross-sectional study, in which 1,397 children participated, with a 6-10 years old probability sampling and from public and private schools in the city of Uberaba, Minas Gerais State, Brazil. WC was measured at the waist narrowest point (WC1) and at the umbilicus level (WC2). Blood samples and blood pressure were collected to determine the MetS diagnosis. There was a significant effect of age (p = 0.001), anatomical point (WC1 vs. WC2, p = 0.001) and sex-anatomical point interaction (p = 0.016) for WC. Smoothed sex- and age-specific 5th, 10th, 25th, 50th, 75th, 90th and 95th percentile curves of WC1 and WC2 were designed by the LMS method. WC was accurate to predict MetS, for all ages [area under the ROC curve (AUC) > 0.79 and p < 0.05], regardless of sex. This study presented percentile curves for WC at two anatomical points in a representative sample of Brazilian children. Furthermore, WC was shown to be a strong predictor of cardiovascular risk factors and MetS in children.

Los objetivos de este estudio fueron desarrollar valores de referencia para la circunferencia de cintura (WC por sus siglas en inglés), en niños brasileños entre 6-10 años de edad, y evaluar los resultados de WC para predecir factores de riesgo cardiovasculares y síndrome metabólico (MetS) en niños. Se trata de un estudio epidemiológico transversal, basado en población, en el que participaron 1.397 niños, de 6 a 10 años de edad con muestreo probabilístico, procedentes de escuelas públicas y privadas en la ciudad de Uberaba, Minas Gerais, Brasil. WC fue medido en el punto de cintura más estrecho (WC1) y al nivel del ombligo (WC2). Las muestras de sangre y presión arterial se recogieron para determinar el diagnóstico de MetS. Había un significativo efecto de la edad (p = 0.001), punto anatómico (WC1 vs. WC2, p = 0.001) y punto de interacción sexo-anatómico (p = 0.016) para el WC. Sexo uniforme y edad específica 5º, 10º, 25º, 50º, 75º, 90º y 95º curvas de percentil de WC1 y WC2 fueron diseñados mediante el método LMS. WC fue exacto para predecir MetS en todas las edades [área bajo la curva ROC (AUC) > 0.79 y p < 0.05], independientemente del sexo. Conclusión: este estudio presentó un percentil de curvas para WC en dos puntos anatómicos en una muestra representativa de niños brasileños. Asimismo, la WC se mostró como un fuerte predictor de factores de riesgo cardiovasculares y MetS en niños.

Abstract Aims: To investigate the effect of 12 weeks of intradialytic aerobic training on serum levels of interleukin-1β, interleukin-6, interleukin-8, interleukin-10, tumor necrosis factor alpha and functional capacity. Methods: Thirty sedentary volunteers were randomly assigned to either to exercise or control group. Exercise group were submitted to 12 weeks of aerobic training performed on a cycle ergometer for 30 minutes at intensity rated using the Borg scale (6 to 7) three times a week while control group kept the daily habits. Results: After 12 weeks only exercise group presented a significant reduction of serum levels of interleukin-1β, interleukin-6, interleukin-8, tumor necrosis factor alpha and an increase in serum levels of interleukin-10 and functional capacity. Conclusion: Twelve weeks of intradialytic aerobic training was effective in controlling inflammation and improving the functional ability of patients with chronic kidney disease.

Abstract Aims: to identify the prevalence of metabolic syndrome (MetS) and associated risk factors in children. Methods: a total of 1,480 Brazilian children aged 6-10 years old (52.2% girls) participated in this population-based, epidemiological cross-sectional study. The inclusion criteria were children born between the years 2001 and 2006, of both sexes, who did not use remedy, were not on a calorie restriction diet, and who respected the 12-hour fast for blood collection. Anthropometric measurements, blood pressure, blood collection, and completion of the Previous Day Food Questionnaire and interview using a Physical Activity List were held at school. Parents were asked to complete a questionnaire on socioeconomic status and lifestyle habits of their child. Chi-square test compared proportions and factors associated with MetS were identified using Poisson Regression. Results: Girls had significantly higher MetS prevalence compared with boys (12.6% vs. 8.5%, p=0.046). After multivariable analysis, body fat percentage (p=0.001), fat mass (p<0.001), lean body mass (p< 0.001) and sedentary behavior (p= 0.050) were positively associated with MetS. Conclusions: Modifiable factors such as body fat percentage, fat mass, lean body mass and sedentary behavior were associated with MetS in children. Thus, interventions targeted for weight management, and adopting healthy habits such as reducing time in front of TV/computer/video game need to be part of the lifestyle of children.

Resumo Objetivos: Desenhar curvas de referência de quatro dobras cutâneas (subescapular, suprailíaca, bíceps, tríceps) e determinar pontos de corte para predizer o risco de SM em crianças de seis a 10 anos. Métodos: Estudo epidemiológico de base populacional, corte transversal, com amostra probabilística, estratificada por segmento de ensino, com 1.480 crianças de seis a 10 anos idade, 52,2% do sexo feminino, oriundas de escolas públicas e privadas nas zonas urbana e rural do município de Uberaba (MG). Antropometria (dobras cutâneas), pressão arterial e as coletas de sangue em jejum foram feitas em espaço reservado na escola, seguiram protocolos específicos. O método LMS foi usado para desenhar as curvas de referência e análise de curva ROC para determinar a acurácia e os pontos de corte para as dobras cutâneas avaliadas. Resultados: As quatro DC avaliadas (subescapular, suprailíaca, bíceps e tríceps) e o seu somatório (∑4DC) foram acurados na predição da SM para meninas e meninos. Adicionalmente, pontos de corte foram propostos e curvas percentílicas (p5, p10, p25, p50, p75, p90 e p95) foram delineadas para as quatro DC e o ∑4DC, para ambos os sexos. Conclusão: Medidas de DC foram acuradas em predizer SM em escolares de seis a 10 anos. As curvas percentílicas de DC desenhadas por idade e sexo fornecem referência na detecção do risco de SM em crianças.

Abstract Objectives: To draw skinfold (SF) reference curves (subscapular, suprailiac, biceps, triceps) and to determine SF cutoff points for predicting the risk of metabolic syndrome (MetS) in children aged 6–10 years old. Methods: This was a cross-sectional study with a random sample of 1480 children aged 6–10 years old, 52.2% females, from public and private schools located in the urban and rural areas of the municipality of Uberaba (MG). Anthropometry, blood pressure, and fasting blood samples were taken at school, following specific protocols. The LMS method was used to draw the reference curves and ROC curve analysis to determine the accuracy and cutoff points for the evaluated skinfolds. Results: The four SF evaluated (subscapular, suprailiac, biceps, and triceps) and their sum (∑4SF) were accurate in predicting MetS for both girls and boys. Additionally, cutoffs have been proposed and percentile curves (p5, p10, p25, p50, p75, p90, and p95) were outlined for the four SF and ∑4SF, for both genders. Conclusion: SF measurements were accurate in predicting metabolic syndrome in children aged 6–10 years old. Age- and gender-specific smoothed percentiles curves of SF provide a reference for the detection of risk for MetS in children.

Abstract AIMS To verify differences in screen time (ST) (hours watching TV, using computer and/or video game) and to compare the percentage of meeting ST recommendation between Portuguese and Brazilian children. METHODS The sample comprised 369 children aged 9 year-old from Portugal (n=95) and Brazil (n=274). ST average (h/day), physical activity (PA) and socioeconomic status (SES) were estimated by parental-report questionnaire. The Student t test or the Mann-Whitney U test and binary logistic regression analysis were used to verify differences and associations on ST (<2h/day) between cities. All analyses were stratified by gender and adjusted for age, BMI, PA and SES. RESULTS The prevalence of meet ST recommendation was 66.7% and 55.3% between Portuguese girls and boys and 25.0% and 16.4%between Brazilian girls and boys. Portuguese girls (1.58±0.84vs3.40 ± 1.76h/day, p<0.05) and boys (1.74 ± 1.18 vs 4.20 ± 2.30 h/day, p<0.05) had significantly less ST than their Brazilian counterparts. Brazilian girls (OR=7.593; p=0.0001) as well as Brazilian boys (OR=6.564; p=0.0001) were more likely to do not meet ST recommendation, compared with their Portuguese counterparts. CONCLUSIONS Portuguese children were approximately seven times more likely to meet ST recommendation than Brazilian children. Differences between countries should be considered in public policy strategies to reduce ST.

Abstract Aims: to design reference percentile curves of waist circumference (WC) in children aged 6-10 from municipalities of developed (Portugal) and developing (Brazil) countries and to compare these results with other international references. Methods: this cross-sectional study enrolled a 6-10-year-old probability sampling. Univariate analysis of covariance adjusted by height was carried out to test the main effects of age, sex, countries, and interactions. WC percentile curves were performed with the LMS Chart Maker. Results: The sample comprised 6,475 children. Portuguese children presented a curvilinear increase in WC curves and Brazilian WC curves have shown a linear increase with age both for boys and girls. Overweight and obesity prevalence was 15.9 % and 4.7 % for Portuguese children and 12.9 % 4.5% for Brazilian children, respectively. There was a main effect (p<0.0001) for age and countries, and an interaction effect for sex*age (p=0.001) and countries*age (p<0.0001). Portuguese boys and girls have shown higher values for the 50th, 75th, and 95th percentiles than Brazilian boys and girls. Conclusions: WC reference percentile curves were drawn for 6-10-year-old Portuguese and Brazilian children. Portuguese children have higher WC values than Brazilian children and other children from developed countries.

Abstract The aim of this study was to verify the association between inflammatory biomarkers, dyslipidemia, obesity and physical activity status in 10-years old children. Ninety-four children participated in this study and were classified into eutrophic (n=36), overweight (n=34) or obese (n=24) according to their body mass index (BMI). The genic expression of interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α) and chemokine C-C motif ligand 2 (CCL-2) mRNA; the serum concentration of high-density lipoprotein cholesterol (HDL-c) and triglycerides; BMI, percentage of body fat (% BF) and waist circumference; and the number of steps per day were determined. The expression of IL-6, TNF-α and CCL-2 were associated (p < 0.05) positively with serum triglycerides, BMI, % BF and waist circumference, and negatively with serum HDL-c. No association (p > 0.05) between pro-inflammatory biomarkers and number of steps per day was found.