Pulmonary Rehabilitation Associated with Noninvasive Ventilation on Physical Capacity and Quality of Life in Post-COVID-19: A Randomized Controlled Double-Blinded Clinical Trial Protocol.

Background: The coronavirus disease-2019 (COVID-19) pulmonary rehabilitation (PR) seems to be a better choice to improve physical and functional capacity after acute infection. However, there is a lack of evidence regarding the effects of different strategies to optimize post-acute phase rehabilitation and reduce long COVID-19 physical deteriorations. Objective: To compare the use of a noninvasive ventilation (NIV) plus aerobic exercise strategy during PR program with to a standard PR (without NIV) on physical capacity and quality of life outcomes in post-COVID-19. Methods: Double-blinded randomized controlled clinical trial. A total of 100 individuals discharged from hospital in a post-acute phase of severe COVID-19 will be randomized into two groups: PR + NIV (Group 1) and PR (Group 2). Inclusion criteria include participants who present symptomatic dyspnea II and III by the modified Medical Research Council, aged 18 years or older. Both groups will receive aerobic and resistance exercise, and inspiratory muscle training. However, group 1 will perform aerobic training with bilevel NIV. Cardiopulmonary exercise test will assess the O2 peak uptake, 6-minute walk test will assess the walking distance and short-form 36 will assess the quality of life before and after 8 weeks (after 24 PR sessions). Moreover, patients will be contacted by telephone every 3 months for one year to record possible adverse events, hospitalizations, and death. All data will be registered in RedCap, and analyses will be performed in the STATA v13 software. Clinical Trial Registration: RBR-3t9pkzt.

Sedentary Behavior, Dietary Habits, and Cardiometabolic Risk in Physically Active Children and Adolescents. / Comportamento Sedentário, Hábitos Alimentares e Risco Cardiometabólico em Crianças e Adolescentes Fisicamente Ativos.

BACKGROUND: Sedentary behavior has been associated with several cardiometabolic risk factors during childhood. However, little is known about the impact of sedentary behavior on the health and eating habits of physically active children and adolescents. OBJECTIVE: To evaluate the association between sedentary behavior and cardiometabolic risk factors and eating habits in physically active children and adolescents. METHODS: This cross-sectional study was conducted, including 516 physically active children and adolescents (10 to 18 years old; both sexes) enrolled in the social project "Estação Conhecimento-Vale" were evaluated. Biochemical and lifestyle variables (questionnaire) were collected. Sedentary behavior was determined indirectly (questionnaire), by using sitting time ≥ 3 hours per day as a cutoff point. A p-value < 0.05 was considered statistically significant for all tests. RESULTS: Sedentary behavior was not associated with overweight/obesity (odds ratio = 0.72 [95% confidence interval (CI): 0.325-1.389]), hypertriglyceridemia (odds ratio = 0.63 [95% CI: 0.306-1.297]), low HDL cholesterol (odds ratio = 0.57 [95% CI: 0.323-1.019]), or high non-HDL cholesterol (odds ratio = 0.63 [95% CI: 0.283-1.389]). However, children and adolescents with sedentary behavior were more likely to regularly consume food in front of the television (odds ratio = 1.96 [95% CI: 1.114-3.456]) and to consume at least one ultra-processed food per day (odds ratio = 2.42 [95% CI: 1.381-4.241]). In addition, they were less likely to consume fruit regularly (odds ratio = 0.52 [95% CI: 0.278-0.967]). CONCLUSION: There was no association between sedentary behavior and cardiometabolic risk factors in physically active children and adolescents. However, sedentary behavior was associated with inadequate eating habits. Thus, we may suggest that the regular engagement in physical activity may attenuate the deleterious effects of sedentary behavior on the cardiometabolic parameters of children and adolescents.

FUNDAMENTO: O comportamento sedentário tem sido associado a diversos fatores de risco cardiometabólicos durante a infância. No entanto, pouco se sabe sobre o impacto do comportamento sedentário na saúde e nos hábitos alimentares de crianças e adolescentes fisicamente ativos. OBJETIVO: Avaliar a associação entre comportamento sedentário e fatores de risco cardiometabólicos e hábitos alimentares em crianças e adolescentes fisicamente ativos. MÉTODOS: Esse estudo transversal avaliou 516 crianças e adolescentes (10 a 18 anos; ambos os sexos) fisicamente ativos integrados no projeto social "Estação Conhecimento-Vale". O comportamento sedentário foi determinado de maneira indireta (questionário), utilizando como ponto de corte o tempo sentado ≥ 3 h/dia. Foram estatisticamente significantes as análises com p-valor < 0,05. RESULTADOS: O comportamento sedentário não foi associado ao excesso de peso (odds ratio = 0,72 [intervalo de confiança (IC) de 95%: 0,325-1,389]), hipertrigliceridemia ( odds ratio = 0,63 [IC95%: 0,306-1,297]), HDL colesterol baixo ( odds ratio = 0,57 [IC95%: 0,323-1,019]) e HDL não colesterol alto ( odds ratio = 0,63 [IC95%: 0,283-1,389]). Contudo, crianças e adolescentes que adotavam comportamento sedentário apresentaram maior chance de consumir regularmente alimentos em frente à televisão ( odds ratio =1,96 [IC95%: 1,114-3,456]) e de consumir pelo menos um alimento ultraprocessado por dia ( odds ratio =2,42 [IC95%: 1,381-4,241]). Além disso, apresentaram menor chance de consumir frutas regularmente (OR=0,52 [IC95%: 0,278-0,967]). CONCLUSÃO: Não houve associação entre comportamento sedentário e fatores de risco cardiometabólicos em crianças e adolescentes fisicamente ativos. Contudo, o comportamento sedentário foi associado a hábitos alimentares inadequados. Dessa forma, podemos sugerir que a prática regular de atividade física pode atenuar os efeitos deletérios do comportamento sedentário nos parâmetros cardiometabólicos de crianças e adolescentes.

Association of sun exposure and seasonality with vitamin D levels in Brazilian children and adolescents.

OBJECTIVE: This study aimed to verify vitamin D concentration in children and adolescents during the seasons of the year and to compare vitamin D concentration between children engaged in outdoor activities and those engaged in indoor activities. METHODS: This is a cross-sectional study with a sample of 708 children and adolescents (aged 6-18 years), excluding 109 (16 were over 19 years old; 39 had a disease that required continuous treatment; 20 were on continuous medication; and 34 had no vitamin D data), ending with 599. The plasma concentration of 25-hydroxyvitamin D2 was measured with commercial kits following manufacturer instructions. RESULTS: Participants who engaged in outdoor activities, as well as those who had data collected during summer and spring, had higher levels of vitamin D. According to the Poisson regression, the proportion of participants with inadequate levels of vitamin D was greater in the participants whose vitamin D was measured during spring (PR 1.15, 95%CI 1.03-1.29) and winter (PR 1.18, 95%CI 1.05-1.32). Also, a greater proportion of inadequate vitamin D was observed for those engaged in indoor activities (PR 1.08, 95%CI 1.01-1.15). CONCLUSIONS: Participants who measured the vitamin during the summer and autumn had a lower prevalence of hypovitaminosis D. Even in regions with high solar incidence throughout the year, vitamin D levels can vary significantly during the period's seasons.

[Standardized nutritional intervention in hypoglycemic inpatients]. / Intervenção nutricional padronizada em pacientes hipoglicêmicos hospitalizados.

The ingestion of rapid absorption carbohydrates (RAC) can be useful to increase serum glucose. This sudy aimed to assess the effectiveness and applicability of nutritional intervention in hypoglycemic situations suffered by conscious inpatients in a general hospital who were receiving oral diet. Seventy-six patients were eligible. Hypoglycemia was defined as a capillary glucose level of > or =50 to < or =70 mg/dL. Nutritional intervention consisted in providing 15-4 g of RAC. The level of capillary glucose was checked after 15 to 20 minutes of the intervention. During the studied period, the rate of effectiveness of the nutritional intervention was 97.6%. Results show that the administration of RAC, a non-invasive method, was applicable in a general hospital and was also potentially effective in restoring capillary glucose levels in conscious hypoglycemic inpatients receiving an oral diet.

Reference values for the tri-ponderal mass index and its association with cardiovascular risk factors in Brazilian adolescents aged 12 to 17 years.

OBJECTIVES: The aims of this study was to determine the cutoff values for tri-ponderal mass index (TMI) and investigate the association between overweight/obesity as classified by TMI and cardiometabolic risk factors in Brazilian adolescents aged 12 to 17 y. METHODS: This was a cross-sectional study comprising 37 815 adolescents (40 % boys; 12-17 y) enrolled in the Study of Cardiovascular Risks in Adolescents. TMI was calculated as weight divided by cubed height (kg/m3). Overweight (TMI-for-age ≥85th percentile to <95th percentile) and obesity (TMI-for-age ≥95th percentile) were determined for both sexes. Poisson regression model analyses were used to test associations. RESULTS: TMI was stable across the age span (12-17 y) in both sexes. Boys and girls classified by TMI as obese had higher prevalence ratios (PR) for hypertension (PR, 4.98; 95% confidence interval [CI], 3.26-7.61 for boys; PR, 6.88; 95% CI, 3.70-12.78 for girls), insulin resistance (PR, 19.72; 95% CI, 13.56-28.69 for boys; PR, 10.04; 95% CI, 7.47-13.50 for girls), hypercholesterolemia (PR,5.05; 95% CI, 3.68-6.94 for boys; PR, 1.44; 95% CI, 1.00-2.11 for girls), and hypertriacylglycerolemia (PR,7.36; 95% CI, 5.16-10.50 for boys; PR, 3.37; 95% CI, 2.52-4.51 for girls) when compared with normal weight counterparts. CONCLUSIONS: Obesity, as classified by TMI, was strongly associated with several cardiovascular risk factors. Our data showed that TMI was stable across the age span. Therefore, a fixed cutoff value to determine weight status in Brazilian adolescents seems appropriate.

Comparing different metabolic indexes to predict type 2 diabetes mellitus in a five years follow-up cohort: The Baependi Heart Study.

This study evaluates the association of anthropometric indexes and the incidence of type 2 diabetes mellitus (T2DM) after a 5-year follow-up. This analysis included 1091 middle-aged participants (57% women, mean age 47 ± 15 years) who were free of T2DM at baseline and attended two health examinations cycles [cycle 1 (2005-2006) and cycle 2 (2010-2013)]. As expected, the participants who developed T2DM after five years (3.8%) had the worst metabolic profile with higher hypertension, dyslipidemia, and obesity rates. Besides, using mixed-effects logistic regression and adjustment for sex, age, and glucose, we found that one unit increase in body adiposity index (BAI) was associated with an 8% increase in their risk of developing T2DM (odds ratio [OR] = 1.08 [95% CI, 1.02-1.14]) and visceral adiposity index (VAI) was associated with a risk increase of 11% (OR = 1.11 [95% CI, 1.00-1.22]). Moreover, a one-unit increase in the triglycerides-glucose index (TyG) was associated with more than four times the risk of developing T2DM (OR = 4.27 [95% CI, 1.01-17.97]). The interquartile range odds ratio for the continuous predictors showed that TyG had the best discriminating performance. However, when any of them were additionally adjusted for waist circumference (WC) or even body mass index (BMI), all adiposity indexes lost the effect in predicting T2DM. In conclusion, TyG had the most substantial predictive power among all three indexes. However, neither BAI, VAI, nor TyG were superior to WC or BMI for predicting the risk of developing T2DM in a middle-aged normoglycemic sample in this rural Brazilian population.

TRI-PONDERAL MASS INDEX IS USEFUL FOR SCREENING CHILDREN AND ADOLESCENTS WITH INSULIN RESISTANCE.

OBJECTIVE: To investigate whether tri-ponderal mass index and body mass index Z scores are equivalent for screening children and adolescents with insulin resistance. METHODS: Cross-sectional study with 296 children and adolescents enrolled at public schools of Vitória, Espírito Santo, Brazil, aged eight to 14 years. The tri-ponderal mass index was calculated as the ratio between weight and height cubed. The body mass index was calculated as the ratio between weight and height squared. Insulin resistance was defined with the homeostatic model assessment (HOMA-IR). RESULTS: The HOMA-IR was higher in the 4th quartile of body mass index Z scores and tri-ponderal mass index compared to 1st and 2nd quartiles for both girls and boys. The areas under the age-adjusted receiver operating characteristic curves were similar between the indices for girls (body mass index Z scores=0.756; tri-ponderal mass index=0.763) and boys (body mass index Z scores=0.831; tri-ponderal mass index=0.843). In addition, according to the simple linear regression analyses estimations, both body mass index Z scores and tri-ponderal mass index explained a significant fraction of the homeostatic model assessment variability for girls (body mass index Z scores: R2=0.269; tri-ponderal mass index: R2=0.289; p<0.001) and boys (body mass index Z scores: R2=0.175; tri-ponderal mass index: R2=0.210; p<0.001). CONCLUSIONS: The tri-ponderal mass index and body mass index Z scores were similar to discriminate children and adolescents with insulin resistance. It is noteworthy that the use of tri-ponderal mass index is clearly advantageous, because it can be calculated with no concerns on adjustments for the age, a fact that makes it very applicable in the clinical practice.

Body fat percentage is better than indicators of weight status to identify children and adolescents with unfavorable lipid profile.

OBJECTIVE: To assess whether the indicators of weight status body mass index and waist-to-height ratio are similar to body fat percentage to identify obese children and adolescents with unfavorable lipid profile. METHODS: This was a cross-sectional study involving 840 children and adolescents (6-18 years). The same individuals were classified as non-obese (

Waist-to-height ratio is as reliable as biochemical markers to discriminate pediatric insulin resistance.

OBJECTIVE: Given the importance of incorporating simple and low-cost tools into the pediatric clinical setting to provide screening for insulin resistance, the present study sought to investigate whether waist-to-height ratio is comparable to biochemical markers for the discrimination of insulin resistance in children and adolescents. METHODS: This cross-sectional study involved students from nine public schools. In total, 296 children and adolescents of both sexes, aged 8-14 years, composed the sample. Waist-to-height ratio, triglycerides/glucose index, and triglycerides-to-HDL-C ratio were determined according to standard protocols. Insulin resistance was defined as homeostatic model assessment for insulin resistance with cut-off point ≥ 3.16. RESULTS: Age, body mass index, frequency of overweight, waist circumference, waist-to-height ratio, insulin, glucose, homeostatic model assessment for insulin resistance, triglycerides, triglycerides/glucose index, and triglycerides-to-HDL-C were higher among insulin resistant boys and girls. Moderate correlation of all indicators (waist-to-height ratio, triglycerides/glucose index, and triglycerides-to-HDL-C ratio) with homeostatic model assessment for insulin resistance was observed for both sexes. The areas under the receiver operational characteristic curves ware similar between waist-to-height ratio and biochemical markers. CONCLUSION: The indicators provided similar discriminatory power for insulin resistance. However, taking into account the cost-benefit ratio, we suggest that waist-to-height ratio may be a useful tool to provide screening for insulin resistance in pediatric populations.

Static cut-points of hypertension and increased arterial stiffness in children and adolescents: The International Childhood Vascular Function Evaluation Consortium.

Pediatric elevated blood pressure (BP) and hypertension are usually defined using traditional BP tables at the 90th and 95th percentiles, respectively, based on sex, age, and height, which are cumbersome to use in clinical practice. The authors aimed to assess the performance of the static cut-points (120/80 mm Hg and 130/80 mm Hg for defining elevated BP and hypertension for adolescents, respectively; and 110/70 mm Hg and 120/80 mm Hg for children, respectively) in predicting increased arterial stiffness. Using data from five population-based cross-sectional studies conducted in Brazil, China, Korea, and New Zealand, a total of 2546 children and adolescents aged 6-17 years were included. Increased arterial stiffness was defined as pulse wave velocity ≥sex-specific, age-specific, and study population-specific 90th percentile. Compared to youth with normal BP, those with hypertension defined using the 2017 American Academy of Pediatrics guideline (hereafter referred to as "percentile-based cut-points") and the static cut-points were at similar risk of increased arterial stiffness, with odds ratios and 95% confidence intervals of 2.35 (1.74-3.17) and 3.07 (2.20-4.28), respectively. Area under the receiver operating characteristic curve and net reclassification improvement methods confirmed the similar performance of static cut-points and percentile-based cut-points (P for difference > .05). In conclusion, the static cut-points performed similarly well when compared with the percentile-based cut-points in predicting childhood increased arterial stiffness. Use of static cut-points to define hypertension in childhood might simplify identification of children with abnormal BP in clinical practice.

Lipid disorders among Black Africans non-users of lipid-lowering medication.

OBJECTIVE: Angola is a sub-Saharan African country where the population has scarce access to lipidlowering medication. We sought to determine the frequency of lipid disorders among Angolan nonusers of lipid-lowering medication. MATERIAL AND METHODS: A cross-sectional descriptive study was carried out in a sample of 604 workers from the public sector. Blood pressure and anthropometric data were measured along with biochemical parameters including total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C). LDL-C to HDL-C ratio (LDL-C/HDL-C) was obtained from LDL-C and HDL-C levels. RESULTS: High frequencies of elevated blood pressure (44.8%), metabolic syndrome (20.2%), increased TC (39.2%) and increased LDL-C (19.3%) were found. Low HDL-C was more frequent in women (62.4% vs. 36.1%, p < 0.001). Isolated hypercholesterolemia was more frequent in men (9.6% vs. 2.5%, p < 0.001). Among men TC, TG, LDL-C and LDL-C/HDL-C ratio were higher and HDL-C was lower in obese than in low-weight and normal-weight participants. Among women TC, TG, LDL-C and LDL-C/HDL-C ratio were higher in obese than in normal-weight participants. Significant linear trend of increasing TC and LDL-C levels as age increased was detected for both genders (p for trend < 0.05). CONCLUSION: The results of our study showed a high frequency of lipid disorders in Angolan non-users of lipid-lowering medication.

Comportamento Sedentário, Hábitos Alimentares e Risco Cardiometabólico em Crianças e Adolescentes Fisicamente Ativos / Sedentary Behavior, Dietary Habits, and Cardiometabolic Risk in Physically Active Children and Adolescents

Resumo Fundamento O comportamento sedentário tem sido associado a diversos fatores de risco cardiometabólicos durante a infância. No entanto, pouco se sabe sobre o impacto do comportamento sedentário na saúde e nos hábitos alimentares de crianças e adolescentes fisicamente ativos. Objetivo Avaliar a associação entre comportamento sedentário e fatores de risco cardiometabólicos e hábitos alimentares em crianças e adolescentes fisicamente ativos. Métodos Esse estudo transversal avaliou 516 crianças e adolescentes (10 a 18 anos; ambos os sexos) fisicamente ativos integrados no projeto social "Estação Conhecimento-Vale". O comportamento sedentário foi determinado de maneira indireta (questionário), utilizando como ponto de corte o tempo sentado ≥ 3 h/dia. Foram estatisticamente significantes as análises com p-valor < 0,05. Resultados O comportamento sedentário não foi associado ao excesso de peso (odds ratio = 0,72 [intervalo de confiança (IC) de 95%: 0,325-1,389]), hipertrigliceridemia ( odds ratio = 0,63 [IC95%: 0,306-1,297]), HDL colesterol baixo ( odds ratio = 0,57 [IC95%: 0,323-1,019]) e HDL não colesterol alto ( odds ratio = 0,63 [IC95%: 0,283-1,389]). Contudo, crianças e adolescentes que adotavam comportamento sedentário apresentaram maior chance de consumir regularmente alimentos em frente à televisão ( odds ratio =1,96 [IC95%: 1,114-3,456]) e de consumir pelo menos um alimento ultraprocessado por dia ( odds ratio =2,42 [IC95%: 1,381-4,241]). Além disso, apresentaram menor chance de consumir frutas regularmente (OR=0,52 [IC95%: 0,278-0,967]). Conclusão Não houve associação entre comportamento sedentário e fatores de risco cardiometabólicos em crianças e adolescentes fisicamente ativos. Contudo, o comportamento sedentário foi associado a hábitos alimentares inadequados. Dessa forma, podemos sugerir que a prática regular de atividade física pode atenuar os efeitos deletérios do comportamento sedentário nos parâmetros cardiometabólicos de crianças e adolescentes.

Abstract Background Sedentary behavior has been associated with several cardiometabolic risk factors during childhood. However, little is known about the impact of sedentary behavior on the health and eating habits of physically active children and adolescents. Objective To evaluate the association between sedentary behavior and cardiometabolic risk factors and eating habits in physically active children and adolescents. Methods This cross-sectional study was conducted, including 516 physically active children and adolescents (10 to 18 years old; both sexes) enrolled in the social project "Estação Conhecimento-Vale" were evaluated. Biochemical and lifestyle variables (questionnaire) were collected. Sedentary behavior was determined indirectly (questionnaire), by using sitting time ≥ 3 hours per day as a cutoff point. A p-value < 0.05 was considered statistically significant for all tests. Results Sedentary behavior was not associated with overweight/obesity (odds ratio = 0.72 [95% confidence interval (CI): 0.325-1.389]), hypertriglyceridemia (odds ratio = 0.63 [95% CI: 0.306-1.297]), low HDL cholesterol (odds ratio = 0.57 [95% CI: 0.323-1.019]), or high non-HDL cholesterol (odds ratio = 0.63 [95% CI: 0.283-1.389]). However, children and adolescents with sedentary behavior were more likely to regularly consume food in front of the television (odds ratio = 1.96 [95% CI: 1.114-3.456]) and to consume at least one ultra-processed food per day (odds ratio = 2.42 [95% CI: 1.381-4.241]). In addition, they were less likely to consume fruit regularly (odds ratio = 0.52 [95% CI: 0.278-0.967]). Conclusion There was no association between sedentary behavior and cardiometabolic risk factors in physically active children and adolescents. However, sedentary behavior was associated with inadequate eating habits. Thus, we may suggest that the regular engagement in physical activity may attenuate the deleterious effects of sedentary behavior on the cardiometabolic parameters of children and adolescents.

Association of sun exposure and seasonality with vitamin D levels in Brazilian children and adolescents / Associação da exposição solar e da sazonalidade com os níveis de vitamina D em crianças e adolescentes brasileiros

Abstract Objective: This study aimed to verify vitamin D concentration in children and adolescents during the seasons of the year and to compare vitamin D concentration between children engaged in outdoor activities and those engaged in indoor activities. Methods: This is a cross-sectional study with a sample of 708 children and adolescents (aged 6-18 years), excluding 109 (16 were over 19 years old; 39 had a disease that required continuous treatment; 20 were on continuous medication; and 34 had no vitamin D data), ending with 599. The plasma concentration of 25-hydroxyvitamin D2 was measured with commercial kits following manufacturer instructions. Results: Participants who engaged in outdoor activities, as well as those who had data collected during summer and spring, had higher levels of vitamin D. According to the Poisson regression, the proportion of participants with inadequate levels of vitamin D was greater in the participants whose vitamin D was measured during spring (PR 1.15, 95%CI 1.03-1.29) and winter (PR 1.18, 95%CI 1.05-1.32). Also, a greater proportion of inadequate vitamin D was observed for those engaged in indoor activities (PR 1.08, 95%CI 1.01-1.15). Conclusions: Participants who measured the vitamin during the summer and autumn had a lower prevalence of hypovitaminosis D. Even in regions with high solar incidence throughout the year, vitamin D levels can vary significantly during the period's seasons.

Resumo Objetivo: Verificar a concentração de vitamina D em crianças e adolescentes durante as estações do ano e comparar essa concentração entre crianças praticantes de atividades ao ar livre e aquelas praticantes de atividades em ambiente fechado. Métodos: Trata-se de estudo transversal com amostra de 708 crianças e adolescentes (seis a 18 anos), excluindo-se 109, pois 16 eram maiores de 19 anos; 39 tinham doença que exigia tratamento contínuo; 20 estavam em uso de medicação contínua; e 34 não tinham dados de vitamina D. Terminou-se, assim, com 599 pacientes. A concentração plasmática de 25-hidroxivitamina D2 foi medida com kits comerciais, seguindo as instruções do fabricante. Resultados: Os participantes que realizaram atividades ao ar livre, assim como aqueles que tiveram dados coletados durante o verão e a primavera, apresentaram níveis mais elevados de vitamina D. De acordo com a regressão de Poisson, a proporção de participantes com níveis inadequados de vitamina D foi maior naqueles cuja medição foi realizada durante a primavera (razão de prevalência — RP 1,15, intervalo de confiança — IC95% 1,03-1,29) e o inverno (RP 1,18, IC95% 1,05-1,32). Além disso, maior proporção de vitamina D inadequada foi observada para aqueles envolvidos em atividades internas (RP 1,08, IC95% 1,01-1,15). Conclusões: Participantes que mediram a vitamina durante o verão e o outono tiveram menor prevalência para hipovitaminose D. Mesmo em regiões com alta incidência solar ao longo do ano os níveis de vitamina D podem variar significativamente durante as estações.

Association between anthropometric indicators of adiposity and hypertension in a Brazilian population: Baependi Heart Study.

BACKGROUND: Recently, some studies have evaluated the role of adiposity measures in the prediction of hypertension risk, but the results are conflicting. Thus, the aim of this study was to compare which of the four indicators of adiposity (waist circumference-WC, body mass index-BMI, body adiposity index-BAI, and visceral adiposity index-VAI) were better associated with hypertension in a Brazilian population. METHODS AND FINDINGS: For this study, were selected 1627 individuals (both genders, and aged over 18 years) resident in the municipality of Baependi, a city located in the Southeast of Brazil. WC, BMI, BAI and VAI were determined according to a standard protocol. Hypertension was defined as mean systolic blood pressure ≥ 140 mmHg and/or diastolic blood pressure ≥ 90 mmHg, and/or antihypertensive drug use. The indicators of adiposity WC, BMI, BAI, and VAI were higher in hypertensive when compared to non-hypertensive individuals. In addition, WC and BMI were most strongly associated with hypertension in men and women, respectively. The area under the curve (AUC) of WC was significantly higher than VAI in men. In women, both AUC of BMI and WC showed higher discriminatory power to predict hypertension than BAI and VAI. CONCLUSIONS: The indicators of adiposity WC and BMI were better associated with hypertension than BAI and VAI, in both genders, and it could be a useful tools for the screening of hypertensive patients.

Tri-ponderal mass index is useful for screening children and adolescents with insulin resistance / O índice de massa tri-ponderal é útil na triagem de crianças e adolescentes com resistência à insulina

ABSTRACT Objective: To investigate whether tri-ponderal mass index and body mass index Z scores are equivalent for screening children and adolescents with insulin resistance. Methods: Cross-sectional study with 296 children and adolescents enrolled at public schools of Vitória, Espírito Santo, Brazil, aged eight to 14 years. The tri-ponderal mass index was calculated as the ratio between weight and height cubed. The body mass index was calculated as the ratio between weight and height squared. Insulin resistance was defined with the homeostatic model assessment (HOMA-IR). Results: The HOMA-IR was higher in the 4th quartile of body mass index Z scores and tri-ponderal mass index compared to 1st and 2nd quartiles for both girls and boys. The areas under the age-adjusted receiver operating characteristic curves were similar between the indices for girls (body mass index Z scores=0.756; tri-ponderal mass index=0.763) and boys (body mass index Z scores=0.831; tri-ponderal mass index=0.843). In addition, according to the simple linear regression analyses estimations, both body mass index Z scores and tri-ponderal mass index explained a significant fraction of the homeostatic model assessment variability for girls (body mass index Z scores: R2=0.269; tri-ponderal mass index: R2=0.289; p<0.001) and boys (body mass index Z scores: R2=0.175; tri-ponderal mass index: R2=0.210; p<0.001). Conclusions: The tri-ponderal mass index and body mass index Z scores were similar to discriminate children and adolescents with insulin resistance. It is noteworthy that the use of tri-ponderal mass index is clearly advantageous, because it can be calculated with no concerns on adjustments for the age, a fact that makes it very applicable in the clinical practice.

RESUMO Objetivo: Investigar se o índice de massa tri-ponderal e os escores-z do índice de massa corporal são equivalentes na triagem de crianças e adolescentes com resistência à insulina. Métodos: Estudo transversal com 296 crianças e adolescentes matriculados em escolas públicas de Vitória, Espírito Santo, Brasil, com idades entre oito e 14 anos. O índice de massa tri-ponderal foi calculado como a razão entre o peso e a altura ao cubo. O índice de massa corporal foi calculado como a razão entre o peso e a altura ao quadrado. A resistência à insulina foi definida pelo modelo de avaliação da homeostase para resistência à insulina (HOMA-IR). Resultados: O HOMA-IR foi maior no 4º quartil dos escores-z do índice de massa corporal e do índice de massa tri-ponderal, em relação ao 1º e 2º quartis em ambos os sexos. As áreas sob as curvas receiver operating characteristic ajustadas por idade foram semelhantes em meninas (escores-z do índice de massa corporal=0,756; índice de massa tri-ponderal=0,763) e meninos (escores-z do índice de massa corporal=0,831; índice de massa tri-ponderal=0,843). Além disso, de acordo com as estimativas das análises de regressão linear simples, os escores-z do índice de massa corporal e o índice de massa tri-ponderal explicaram uma fração significativa da variabilidade do modelo de avaliação da homeostase para meninas (escores-z do índice de massa corporal: R2=0,269; índice de massa tri-ponderal: R2=0,289; p<0,001) e meninos (escores-z do índice de massa corporal: R2=0,175; índice de massa tri-ponderal: R2=0,210; p<0,001). Conclusões: O índice de massa tri-ponderal e os escores-z do índice de massa corporal foram semelhantes na triagem de crianças e adolescentes com resistência à insulina. É importante ressaltar que o uso do índice de massa tri-ponderal é claramente vantajoso, pois pode ser calculado sem ajustes por idade, fato que o torna muito aplicável à prática clínica.

Body fat percentage is better than indicators of weight status to identify children and adolescents with unfavorable lipid profile / Percentual de gordura corporal é melhor que indicadores da condição do peso para identificar crianças e adolescentes com perfil lipídico desfavorável

Abstract Objective: To assess whether the indicators of weight status body mass index and waist-to-height ratio are similar to body fat percentage to identify obese children and adolescents with unfavorable lipid profile. Methods: This was a cross-sectional study involving 840 children and adolescents (6-18 years). The same individuals were classified as non-obese (<P95) or obese (≥P95) according to body fat percentage and indicators of weight status, body mass index, and waist-to-height ratio. Body fat percentage was obtained by multi-frequency bioelectrical impedance. Linear association between obesity and increased lipid fractions was tested by ANCOVA. Normal distribution curves of non-HDL cholesterol were designed for obese and non-obese. To provide the proportion of obese individuals with elevated non-HDL-c across all indicators, Z-score was calculated. Results: Obese boys presented higher non-HDL cholesterol when compared with those non-obese, classified by body mass index (107 ± 28 vs. 94 ± 25 mg/dL, p = 0.001), waist-to-height ratio (115 ± 29 vs. 94 ± 25 mg/dL, p < 0.001) and body fat percentage (119 ± 33 vs. 94 ± 24 mg/dL, p < 0.001). Differently, obese girls presented with higher non-HDL cholesterol when compared with those non-obese only according to the body fat percentage classification (118 ± 24 vs. 96 ± 26 mg/dL, p = 0.001). A large shift to the right in the distribution curve of non-HDL cholesterol among obese girls compared with non-obese was observed only when body fat percentage was used to discriminate between obese and non-obese. Conclusion: Body fat percentage was better than the indicators of weight status to identify children and adolescents with unfavorable lipid profile, mainly among girls.

Resumo Objetivo: Investigar se os indicadores da condição do peso, índice de massa corporal e razão cintura/estatura são semelhantes ao percentual de gordura corporal para identificação de crianças e adolescentes obesos com perfil lipídico desfavorável. Métodos: Estudo transversal que envolveu 840 crianças e adolescentes (6‐18 anos). Os mesmos indivíduos foram classificados em não obesos (p < 95) ou obesos (p ≥ 95) de acordo com o percentual de gordura corporal e os indicadores da condição do peso, índice de massa corporal e razão cintura/estatura. O percentual de gordura corporal foi obtido por bioimpedância multifrequencial tetrapolar. A associação linear entre obesidade e aumento das frações lipídicas foi tesada por ANCOVA. As curvas de distribuição normal de colesterol não HDL foram construídas para obesos e não obesos. Para fornecer a proporção de indivíduos obesos com colesterol não HDL elevado para todos os indicadores, o escore z foi calculado. Resultados: Os meninos obesos apresentaram maior colesterol não HDL em comparação com não obesos de acordo com a classificação fornecida pelo índice de massa corporal (107 ± 28 em comparação com 94 ± 25 mg/dL, p = 0,001), razão cintura/estatura (115 ± 29 em comparação com 94 ± 25 mg/dL, p < 0,001) e percentual de gordura corporal (119 ± 33 em comparação com 94 ± 24 g/dL, p < 0,001). Diferentemente, as meninas obesas apresentaram maior colesterol não HDL em comparação com as não obesas, somente de acordo com a classificação fornecida pelo percentual de gordura corporal (118 ± 24 em comparação com 96 ± 26 mg/dL, p = 0,001). Um grande deslocamento para a direita na curva de distribuição de colesterol não HDL entre meninas obesas em comparação com não obesas foi observado somente quando o percentual de gordura corporal foi utilizado para discriminar obesas e não obesas. Conclusão: O percentual de gordura corporal é melhor do que os indicadores da condição do peso na identificação de crianças e adolescentes com perfil lipídico desfavorável, principalmente entre meninas.

Body mass index, waist circumference, body adiposity index, and risk for type 2 diabetes in two populations in Brazil: general and Amerindian.

OBJECTIVE: The use of the anthropometric indices of adiposity, especially body mass index and waist circumference in the prediction of diabetes mellitus has been widely explored. Recently, a new body composition index, the body adiposity index was proposed. The aim of this study was to compare the effectiveness of body mass index, waist circumference, and body adiposity index in the risk assessment for type 2 diabetes mellitus. DESIGN AND METHODS: A total of 1,572 individuals from the general population of Vitoria City, Brazil and 620 Amerindians from the Aracruz Indian Reserve, Brazil were randomly selected. BMI, waist circumference, and BAI were determined according to a standard protocol. Type 2 diabetes mellitus was diagnosed by the presence of fasting glucose ≥126 mg/dL or by the use of antidiabetic drugs. RESULTS: The area under the curve was similar for all anthropometric indices tested in the Amerindian population, but with very different sensitivities or specificities. In women from the general population, the area under the curve of waist circumference was significantly higher than that of the body adiposity index. Regarding risk assessment for type 2 diabetes mellitus, the body adiposity index was a better risk predictor than body mass index and waist circumference in the Amerindian population and was the index with highest odds ratio for type 2 diabetes mellitus in men from the general population, while in women from the general population waist circumference was the best risk predictor. CONCLUSION: Body adiposity index was the best risk predictor for type 2 diabetes mellitus in the Amerindian population and men from the general population. Our data suggest that the body adiposity index is a useful tool for the risk assessment of type 2 diabetes mellitus in admixture populations.

Waist-to-height ratio is as reliable as biochemical markers to discriminate pediatric insulin resistance / A razão cintura/estatura é tão confiável quanto marcadores bioquímicos para discriminar resistência à insulina

Abstract Objective: Given the importance of incorporating simple and low-cost tools into the pediatric clinical setting to provide screening for insulin resistance, the present study sought to investigate whether waist-to-height ratio is comparable to biochemical markers for the discrimination of insulin resistance in children and adolescents. Methods: This cross-sectional study involved students from nine public schools. In total, 296 children and adolescents of both sexes, aged 8 -14 years, composed the sample. Waist-to-height ratio, triglycerides/glucose index, and triglycerides-to-HDL-C ratio were determined according to standard protocols. Insulin resistance was defined as homeostatic model assessment for insulin resistance with cut-off point ≥ 3.16. Results: Age, body mass index, frequency of overweight, waist circumference, waist-to-height ratio, insulin, glucose, homeostatic model assessment for insulin resistance, triglycerides, triglycerides/glucose index, and triglycerides-to-HDL-C were higher among insulin resistant boys and girls. Moderate correlation of all indicators (waist-to-height ratio, triglycerides/glucose index, and triglycerides-to-HDL-C ratio) with homeostatic model assessment for insulin resistance was observed for both sexes. The areas under the receiver operational characteristic curves ware similar between waist-to-height ratio and biochemical markers. Conclusion: The indicators provided similar discriminatory power for insulin resistance. However, taking into account the cost-benefit ratio, we suggest that waist-to-height ratio may be a useful tool to provide screening for insulin resistance in pediatric populations.

Resumo Objetivo: Considerando a importância de incorporar ferramentas simples e de baixo custo no cenário clínico-pediátrico para a triagem de resistência à insulina, o presente estudo buscou investigar se a razão cintura/estatura é comparável a marcadores bioquímicos na discriminação de resistência à insulina em crianças e adolescentes. Métodos: Este estudo transversal envolveu estudantes de nove escolas públicas. No total, 296 crianças e adolescentes, de ambos os sexos, com idades entre 8 e 14 anos, compuseram a amostra. A razão cintura/estatura, o índice triglicerídeos/glicose e a razão triglicerídeos/HDL-C foram determinados de acordo com protocolos padrão. A resistência à insulina foi definida por meio do modelo de avaliação homeostática para resistência insulínica, com ponto de corte ≥ 3.16. Resultados: Idade, índice de massa corporal, frequência de excesso de peso, circunferência da cintura, razão cintura/estatura, insulina, glicemia, modelo de avaliação homeostática para resistência insulínica, triglicerídeos, índice triglicerídeos/glicose e razão triglicerídeos/HDL-C foram maiores entre meninos e meninas com resistência à insulina. Também foram observadas, em ambos os sexos, correlações moderadas de todos os indicadores (razão cintura/estatura, índice triglicerídeos/glicose e razão triglicerídeos/HDL-C) com o modelo de avaliação homeostática para resistência à insulina. As áreas sob as curvas ROC foram semelhantes entre a razão cintura/estatura e os marcadores bioquímicos. Conclusão: Os indicadores forneceram poder discriminatório similar para a resistência à insulina. No entanto, levando em conta o custo-benefício, sugerimos que a razão cintura/estatura pode ser uma ferramenta útil para a triagem de resistência à insulina em populações pediátricas.

Prevalência de doença arterial periférica e fatores de risco associado em uma população rural brasileira: estudo Corações de Baependi / Prevalence of peripheral artery disease and associated risk factors in a brazilian rural population: the Baependi heart study

A identificação da doença arterial periférica (DAP) pode atenuar a progressão e suas complicações adicionais, uma vez que a DAP é um fator de risco para mortalidade geral e cardiovascular. Avaliar a prevalência de DAP na população do Estudo Corações de Baependi e investigar fatores de risco associados em diferentes grupos etários. Foram selecionados 1.627 indivíduos (ambos os sexos e idade entre 18 e 102 anos) residentes no município de Baependi (Minas Gerais, Brasil). Os parâmetros antropométricos e bioquímicos foram avaliados por meio de protocolos padrões. O nível de atividade física foi determinado pelo Questionário Internacional de Atividade Física - Versão Curta (IPAQ-SF). A triagem da DAP foi realizada pelo índice tornozelo-braço (ITB). O nível de significância estatística adotado nas análises foi de 5%. Na população total, a prevalência de DAP foi de 1,05% e atingiu 5,2% após os 70 anos de idade. A frequência e intensidade do tabagismo foram maiores nos indivíduos com DAP. Uma história prévia de infarto do miocárdio e maior prevalência de hipertensão, diabetes, obesidade e sedentarismo também estiveram associados à DAP. Além disso, a DAP foi mais frequente em negros que em brancos. Após análise multivariada, a idade, diabetes, tabagismo e inatividade física permaneceram independentemente associados à DAP. A prevalência de DAP foi baixa e claramente aumentou com a idade em nossa amostra de uma população rural brasileira. Além disso, os principais fatores de risco para DAP foram tabagismo, sedentarismo, diabetes e idade

The identification of peripheral artery disease (PAD) can help prevent further progression of the disease and additional complications, considering that this condition is a risk factor for all-cause mortality and cardiovascular death. To assess the prevalence of PAD in the Baependi Heart Study and investigate associated risk factors in different age groups. A total of 1,627 individuals (of both genders and aged 18 - 102 years) residing in the municipality of Baependi (Minas Gerais, Brazil) were selected for this study. Anthropometric and biochemical parameters were evaluated by standard techniques. Physical activity level was determined by the International Physical Activity Questionnaire - Short Form (IPAQ-SF). The screening of PAD was performed by determination of the ankle-brachial index (ABI). The level of statistical significance was set at 5%. In the overall sample, the prevalence of PAD was 1.05%, and reached 5.2% after the age of 70 years. The frequency and intensity of smoking were higher in individuals with PAD. A prior history of myocardial infarction and a higher prevalence of hypertension, diabetes, obesity, and sedentary lifestyle were also associated with PAD. In addition, PAD was more frequent in blacks than whites. In multivariable analysis, age, diabetes, smoking, and physical inactivity remained independently associated with PAD. The prevalence of PAD was low and increased clearly with age in our sample from a Brazilian rural population. Furthermore, the main risk factors for PAD in the investigated sample were smoking, sedentary lifestyle, diabetes mellitus, and age

Lipid disorders among Black Africans non-users of lipid-lowering medication

ABSTRACT Objective: Angola is a sub-Saharan African country where the population has scarce access to lipidlowering medication. We sought to determine the frequency of lipid disorders among Angolan nonusers of lipid-lowering medication. Material and methods: A cross-sectional descriptive study was carried out in a sample of 604 workers from the public sector. Blood pressure and anthropometric data were measured along with biochemical parameters including total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C). LDL-C to HDL-C ratio (LDL-C/HDL-C) was obtained from LDL-C and HDL-C levels. Results: High frequencies of elevated blood pressure (44.8%), metabolic syndrome (20.2%), increased TC (39.2%) and increased LDL-C (19.3%) were found. Low HDL-C was more frequent in women (62.4% vs. 36.1%, p < 0.001). Isolated hypercholesterolemia was more frequent in men (9.6% vs. 2.5%, p < 0.001). Among men TC, TG, LDL-C and LDL-C/HDL-C ratio were higher and HDL-C was lower in obese than in low-weight and normal-weight participants. Among women TC, TG, LDL-C and LDL-C/HDL-C ratio were higher in obese than in normal-weight participants. Significant linear trend of increasing TC and LDL-C levels as age increased was detected for both genders (p for trend < 0.05). Conclusion: The results of our study showed a high frequency of lipid disorders in Angolan non-users of lipid-lowering medication.