ABSTRACT Introduction: The pandemic caused by COVID-19 has resulted in worrying effects related to the “new” habits adopted by the population. The long period of school closures and social isolation have profoundly impacted the learning, health, and protection of children and adolescents. Objective: To re-evaluate school athletes quarantined by COVID-19, highlighting the main physical activity (PA), eating and sleeping habits, and the implications related to physical and mental health after one year of the pandemic in the city of Curitiba, Brazil. Methods: Two surveys were conducted, 342 attended the first assessment, and 222 attended the second. An online questionnaire (Google docs) was applied to the students, consisting of 18 closed and open questions in the first moment (beginning of the pandemic) and 22 at the second moment (after one year of the pandemic). Results: Half of the students (53.2%; 57%) reported eating up to three meals daily. With regard to sleeping hours, the majority of students (80%; 79.5%) were able to sleep at night between 6:00 and 10:00. There was a significant decrease in the time spent on social networks, migrating to school activities (p <0.005). Approximately a quarter of the student-athletes (27%) practiced PA every day and felt fulfilled in the first assessment, and in the second assessment, this number increased to 43% (p = 0.009). Conclusion: Despite the decrease in screen time and the increase in regular PA, there was an increase in body weight in more than a third of the athletes evaluated. Those who maintained their body weight maintained healthier lifestyles with several meals within the recommended range and slept 6 to 10 hours per night. Level of Evidence III; Retrospective comparative study.

RESUMEN Introducción: La pandemia provocada por el COVID-19 trajo efectos preocupantes relacionados con los “nuevos” hábitos adoptados por la población. El largo período de cierre de escuelas y aislamiento social ha impactado profundamente en el aprendizaje, la salud y la protección de niños, niñas y adolescentes. Objetivo: Reevaluar atletas escolares sometidos a cuarentena por COVID-19, destacando los principales hábitos de actividad física (AF), alimentación y sueño y las implicaciones relacionadas con la salud física y mental después de un año de pandemia en la ciudad de Curitiba, Brasil. Métodos: Se realizaron dos encuestas, 342 asistieron a la primera evaluación y 222 a la segunda. Se aplicó un cuestionario en línea (Google docs) a los estudiantes, compuesto por 18 preguntas cerradas y abiertas en el primer momento (inicio de la pandemia) y 22 en el segundo momento (después de un año de pandemia). Resultados: La mitad de los estudiantes (53,2%; 57%) refirió tener hasta tres comidas al día. En cuanto al tiempo de sueño, la mayoría de los estudiantes (80%; 79,5%) pudo dormir por la noche entre las 6:00 y las 10:00. Hubo una disminución significativa en el tiempo dedicado a las redes sociales, migrando a las actividades escolares (p <0,005). Aproximadamente una cuarta parte de los estudiantes deportistas (27%) practicaban AF todos los días y se sentían realizados en la primera evaluación, y en la segunda evaluación este número aumentó al 43% (p = 0,009). Conclusión: A pesar de la disminución del tiempo de pantalla y del aumento de la AF regular, hubo un aumento del peso corporal en más de un tercio de los atletas evaluados. Los que mantuvieron su peso corporal fueron aquellos que mantuvieron estilos de vida más saludables con varias comidas dentro del rango recomendado y que dormían de 6 a 10 horas por noche. Nivel de Evidencia III; Estudio comparativo retrospectivo.

RESUMO Introdução: A pandemia provocada pelo COVID-19 resultou em efeitos preocupantes relacionados aos “novos” hábitos adotados pela população. O longo período de fechamento das escolas e o isolamento social têm impactado profundamente a aprendizagem, a saúde e a proteção de crianças e adolescentes. Objetivo: Reavaliar atletas escolares submetidos à quarentena por COVID-19, destacando os principais hábitos de atividade física (AF), alimentação e sono e as implicações relacionadas à saúde física e mental após um ano de pandemia na cidade de Curitiba, Brasil. Métodos: Foram realizadas duas pesquisas, 342 compareceram à primeira avaliação e 222 à segunda. Foi aplicado aos alunos um questionário online (Google docs), composto por 18 questões fechadas e abertas no primeiro momento (início da pandemia) e 22 no segundo momento (após um ano de pandemia). Resultados: Metade dos alunos (53,2%; 57%) relatou fazer até três refeições ao dia. Quanto ao horário de sono, a maioria dos alunos (80%; 79,5%) conseguiu dormir à noite entre 6h00 e 10h00. Houve diminuição significativa do tempo gasto nas redes sociais, migrando para atividades escolares (p <0,005). Aproximadamente um quarto dos alunos atletas (27%) praticava AF todos os dias e se sentiu realizado na primeira avaliação, e na segunda avaliação esse número aumentou para 43% (p = 0,009). Conclusão: Apesar da diminuição do tempo de tela e do aumento da AF regular, houve aumento do peso corporal em mais de um terço dos atletas avaliados. Os que mantiveram o peso corporal foram os que mantiveram estilos de vida mais saudáveis com várias refeições dentro da faixa recomendada e que dormiam de 6 a 10 horas por noite. Nível de Evidência III; Estudo retrospectivo comparativo.

Abstract Introduction: There is a linear association between pregestational body mass index (BMI) and almost all adverse pregnancy outcomes. Pregnancy is “a window of opportunities” in terms of changing behavior and improving awareness of healthy living. The proper assessment of physical activity levels, during pregnancy, determines trends, health benefits, and their effects over time. This study aims to describe maternal physical activity levels, stratified by pregestational BMI, verify the accomplishment of physical activity recommendations in pregnant women, and correlate pregestational BMI and physical activity accomplishment with maternal, delivery, and neonatal parameters. Methods: A retrospective cohort study was carried out with 103 pregnant women. Physical activity levels were evaluated using a questionnaire and accelerometry. Pregestational BMI was obtained through the Quetelet formula and used the American College of Sports Medicine’s guidelines were used to determine physical activity accomplishment levels. Continuous data were presented as mean and standard deviation and categorical data as numbers and percentages. The F test was used to examine the differences between groups. Results: Pregnant women in the sample spent 42.9% of their time on household activities, and for pregnant women with obesity, 91.5% of the time was spent on sedentary activities. Women with normative BMI had higher levels of moderate-intensity activities. Only 15.8% of participants with obesity reached the international recommendations for physical activity practice and women who accomplished physical activity recommendations gained less weight during pregnancy. A high percentage of pre-obesity and obese pregnant women exceeded the recommendations for gestational weight gain and the gestational diabetes prevalence was higher in the obesity group (p = 0.03 between groups). Regarding delivery and neonatal parameters (Apgar score 1st, Apgar score 5th, birth weight, length and head circumference), no statistical differences were found when adjusted to a gestational week at birth, between BMI (p = 0.58; p = 0.18; p = 0.60; p = 0.34; p = 0.34, respectively) or physical activity (p = 0.12; p = 0.15; p = 0.83; p = 0.70; p = 0.70, respectively) groups. Conclusion: Pregnant women with obesity, exhibit high levels of sedentary behavior, a high prevalence of gestational diabetes, and exceed recommended gestational weight gain. Healthcare professionals have a crucial role in promoting regular physical activity and lifestyle changes before and during pregnancy.

Resumo Introdução: Existe uma associação linear entre o Índice de Massa Corporal (IMC) pré-gestacional e quase todos os desfechos adversos da gravidez. A gravidez é “uma janela de oportunidades” em termos de mudança de comportamento e melhoria da conscientização sobre uma vida saudável. A avaliação adequada dos níveis de Atividade Física, durante a gravidez, determina tendências, benefícios para a saúde e os seus efeitos ao longo do tempo. Este estudo tem como objetivo descrever as atividades e os níveis de atividade física materna, estratificados pelo IMC pré-gestacional, verificar o cumprimento das recomendações de atividade física em grávidas e correlacionar o IMC e a realização de atividade física com parâmetros maternos, de parto e neonatais. Métodos: Foi realizado um estudo de coorte retrospetivo com 103 grávidas. O tipo e a intensidade da atividade física foram avaliados por questionário e acelerometria, o IMC pré-gestacional foi obtido pela fórmula de Quetelet e utilizaram-se as diretrizes do American College of Sport Medicine para determinar os níveis de realização da atividade física. Os dados contínuos foram apresentados em média e desvio padrão, e os dados categóricos em números e percentagens. O F test e foi utilizado para examinar as diferenças entre os grupos. Resultados: As grávidas da amostra despenderam 42.9% do tempo em atividades domésticas e, as grávidas com obesidade, 91.5% do tempo em atividades sedentárias. Grávidas com IMC normativo apresentaram níveis mais elevados de atividades de intensidade moderada, 15.8% das participantes com obesidade atingiram as recomendações internacionais para a prática de atividade física e as mulheres que cumpriram as recomendações de atividade física ganharam menos peso durante a gravidez. Grande percentagem das grávidas com sobrepeso e obesidade não cumpriu com as recomendações para ganho de peso gestacional e a incidência de diabetes gestacional foi maior no grupo obesidade (p = 0.03 entre os grupos). Relativamente aos parâmetros de parto e neonatais (apgar 1º, apgar 5º, peso tamanho e perímetro cefálico), não foram encontradas diferenças estatísticas, quando os scores foram ajustados à semana de gestacional, entre os grupos de IMC (p = 0.58; p = 0.18; p = 0.60; p = 0.34; p = 0.34 respetivamente) ou atividade física (p = 0.12; p = 0.15; p = 0.83; p = 0.70; p = 0.70 respetivamente). Conclusão: Grávidas com obesidade apresentam altos níveis de comportamento sedentário, alta prevalência de diabetes gestacional e excedem o ganho de peso gestacional recomendado. Os profissionais de saúde têm um papel crucial na promoção da atividade física regular e mudanças no estilo de vida antes e durante a gravidez.

Abstract Background: Water deficit and salinity are common conditions in arid agro-ecosystems. Hypothesis: Salinty increases the hydric stress effect on the yield and gel quality of Aloe vera. Study species and data description: In A. vera plants the variables meassured were: plant height, leaf length, width, and thickness, fresh biomass, the relative content of water, total solids, gel percentage, and harvest index. Study site and dates: The study was conducted from spring to summer 2020 in Bermejillo, Durango, Mexico. Methods: A split-block experimental design with four replications was used. The large plots were two soil moisture contents: field capacity (18.5 ± 2.5 %) and permanent wilting point (12.5 ± 2.5 %). The small plot was the salinity, with levels: 0, 20, 40, 60, and 80 mM of NaCl. Results: Water deficit and salinity reduced the width and thickness of leaves and, consequently, the fresh biomass and gel percentage were reduced, but gel quality increased. Conclusions: Water deficit and salinity, mainly the latter, reduced plant growth and leaves, and therefore, the yield of fresh biomass and gel. Although gel yield was reduced, its quality was enhanced, in terms of high total solids content.

Resumen Antecedentes: El déficit hídrico y la salinidad son condiciones comunes en los agroecosistemas de zonas áridas. Hipótesis: El estrés salino incrementa los efectos del estrés hídrico sobre el rendimiento y calidad de gel de Aloe vera. Especies de estudio y descripción de datos: En A. vera se midieron las variables: altura de planta, longitud, ancho y grosor de hoja, el contenido relativo de agua, sólidos totales, biomasa fresca, porcentaje de gel e índice de cosecha. Sitio de estudio y fechas: El estudio se llevó a cabo durante el periodo primavera-verano de 2020 en Bermejillo, Durango, México. Métodos: Se usó un diseño experimental en parcelas divididas con arreglo en bloques completos al azar con cuatro repeticiones. La parcela grande fue el contenido de humedad en el suelo: capacidad de campo (18.5 ± 2.5 %) y punto de marchitez permanente (12.5 ± 2.5 %). La parcela chica fue la salinidad con cinco niveles: 0, 20, 40, 60 y 80 mM de NaCl. Resultados: El déficit hídrico y la salinidad del agua, redujeron el ancho y grosor de hojas, biomasa fresca y porcentaje de gel, pero mejoró la calidad de este último. Conclusiones: El déficit hídrico y la salinidad, principalmente este último factor, redujeron el crecimiento de la planta y hojas y, por ende, la biomasa fresca. Aun cuando, el rendimiento de gel fue reducido, la calidad de éste mejoró, en términos de alto contenido de sólidos totales.

Abstract Introduction: food type represents higher odds of having obesity (OB), especially in overweight (OW) subjects. Minimally and ultra-processed foods can be associated with the odds of having OB in OW subjects. Objective: to investigate the association of minimally and ultra-processed food consumption with OB in OW adults. Methods: we included 15,024 participants (9,618 OW [25.0-29.9 kg/m2], 5,406 OB [≥ 30 kg/m2]) with ages ranging from 18 to 59 years from the 2019 baseline survey of the Surveillance of Risk Factors and Protection for Chronic Diseases by Telephone Survey (VIGITEL, Brazil). Minimally and ultra-processed food daily consumption scores and confounding variables (age, sex, scholarly, physical activity, hypertension, and diabetes) were measured. Binary logistic regression analyzes the association of minimally and ultra-processed food consumption scores with OB (odds ratio [OR]). Results: minimally processed food consumption score quartiles (1st = 1[food-score/day]; 2nd = 6[food-score/day]; 3rd = 7[food-score/day]; 4th = 8[food-score/day]) presented higher values compared to ultra-processed food (1st = 1[food-score/day]; 2nd = 1[food-score/day]; 3rd = 2[food-score/day]; 4th = 4[food-score/day]). For each score of minimally processed food consumed, there was a -5.9 % odds of OB. Thus, the higher quartile (4th) of minimally processed food consumption score represents less odds of OB (OR: -47.2 %; p < 0.001). Each ultra-processed food score consumed presented odds of 3.7 % of OB. Therefore, higher consumption of ultra-processed food (4th quartile) shows higher odds of OB (OR: +14.8 %; p < 0.001). All associations remained significatively even after being adjusted by the confounders. Conclusion: the consumption scores of minimally processed and ultra-processed foods presented a magnitude capable of impacting OW adults' odds of OB, even when controlled by sociodemographic factors, physical activity, hypertension, and diabetes.

Resumen Introducción: el tipo de alimentación representa una mayor probabilidad de tener obesidad (OB), especialmente en sujetos con sobrepeso (SO). Los alimentos mínimamente procesados y ultraprocesados se pueden asociar con las probabilidades de tener OB en sujetos con SO. Objetivo: investigar la asociación del consumo de alimentos mínimamente procesados y ultraprocesados con la OB en adultos con SO. Métodos: se incluyeron 15.024 participantes (9.618 SO [25,0-29,9 kg/m2], 5.406 OB [≥ 30 kg/m2]) con edades entre 18 y 59 años de la encuesta basal 2019 de la Vigilancia de Factores de Riesgo y Protección para Enfermedades Crónicas mediante una Encuesta Telefónica (VIGITEL, Brasil). Se midió el puntaje de consumo diario de alimentos mínimamente procesados y ultraprocesados y variables de confusión (edad, sexo, escolaridad, actividad física, hipertensión y diabetes). Mediante una regresión logística binaria se analizó la asociación de las puntuaciones de consumo de alimentos mínimamente procesados y ultraprocesados con la OB (odds ratio [OR]). Resultados: los cuartiles de puntuación de consumo de alimentos mínimamente procesados (1.º = 1[alimento-puntuación/día]; 2.º = 6[alimento-puntuación/día]; 3.º = 7[alimento-puntuación/día]; 4.º = 8[alimento-puntuación/día]) presentaron valores superiores en comparación con los alimentos ultraprocesados (1.º = 1[alimento-puntuación/día]; 2.º = 1[alimento-puntuación/día]; 3.º = 2[alimento-puntuación/día]; 4.º = 4[alimento-puntuación/día]). Por cada punto de alimentos mínimamente procesados consumidos, hubo una probabilidad de OB del -5,9 %. Por lo tanto, el cuartil más alto (4.º) de puntuación de consumo de alimentos mínimamente procesados representa menos probabilidades de OB (OR: -47,2 %; p < 0,001). Cada puntaje de alimentos ultraprocesados consumidos presentó probabilidades de 3.7 % de OB. Por lo tanto, un mayor consumo de alimentos ultraprocesados (cuartil 4.º) muestra mayores probabilidades de OB (OR: +14,8 %; p < 0,001). Todas las asociaciones se mantuvieron significativamente incluso después de ajustarlas por los factores de confusión. Conclusión: las puntuaciones de consumo de alimentos mínimamente procesados y ultraprocesados impactaron en la probabilidad de desarrollar OB en adultos con SB, incluso cuando se controló por factores sociodemográficos, actividad física, hipertensión y diabetes.

Resumen Antecedentes: En México los embarazos adolescentes son 77 por cada 1,000. De los nacimientos anuales, el 17% son de madres adolescentes, con casi 350,000. Objetivo: Explicar por qué las adolescentes se embarazan a pesar del conocimiento de métodos anticonceptivos. Métodos: Con un estudio exploratorio y observacional, se evaluaron a 300 adolescentes embarazadas de 15 a 19 años, que no tenían antecedentes de consumo de sustancias adictivas y cuyos embarazos no fueron resultado de una violación.. Se aplicó el cuestionario de funcionamiento familiar y una entrevista de los antecedentes sociodemográficos. Resultados: El inicio de vida sexual fue a los 12 años para el 1.7%, de las participantes, a los 13 para el 7.3%, a los 14 para el 18.7%, a los 15 para el 36%, a los 16 para el 19.3% y las restantes (17%) tuvieron un inicio a los 19 años. El 100% manifestó que conocía métodos anticonceptivos, incluyendo la píldora del día siguiente. Conclusiones: El embarazo a temprana edad viene acompañado de mitos sociales e individuales sobre el conocimiento de la sexualidad humana, la anticoncepción y la vida amorosa. El embarazo representa para las jóvenes tener un objeto de amor y obtener un lugar en el mundo y dentro sus familias.

Abstract Background: In Mexico, teenage pregnancy is 77 for every 1,000. In terms of annual births, 17% are from teenage mothers, which are almost 350,000. Objective: To explain why teenage girls get pregnant in spite of knowing about contraceptives. Method: An observational and exploratory study by which 300 pregnant teenage girls between 15 and 19 years old were evaluated, with no history of substance abuse and whose pregnancies were not the result of rape. A questionnaire on family dynamics and an interview about their sociodemographic background were applied. Results: The first sexual intercourse for 1.7% of the participants was at 12 years old; for 7.3%, at 13; for 18.7%, at 14; for 36%, at 15; for 19.3%, at 16, and for the remaining 17%, near 19 years old. All of them (100%) stated they knew about contraceptives, including the morning-after pill. Conclusions: Pregnancies at an early age come with individual and social myths about the knowledge of human sexuality, contraception, and love life. For these young women, a pregnancy represents an object of love and obtaining a place in the world and within their families.

Abstract Background Subarachnoid hemorrhage (SAH) prognosis remains poor. Vasospasm mechanism might be associated with inflammation. Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) have been studied as inflammation markers and prognostic predictors. Objective We aimed to investigate NLR and PLR in admission as predictors of angiographic vasospasm and functional outcome at 6 months. Methods This cohort study included consecutive aneurysmal SAH patients admitted to a tertiary center. Complete blood count was recorded at admission before treatment. White blood cell count, neutrophil count, lymphocyte count, platelet count, NLR, and PLR were collected as independent variables. Vasospasm occurrence-modified Rankin scale (mRS), Glasgow outcome scale (GOS), and Hunt-Hess score at admission and at 6 months were recorded as dependent variables. Multivariable logistic regression models were used to adjust for potential confounding and to assess the independent prognostic value of NLR and PLR at admission. Results A total of 74.1% of the patients were female, with mean age of 55.6 ± 12.4 years. At admission, the median Hunt-Hess score was 2 (interquartile range [IQR] 1), and the median mFisher was 3 (IQR 1). Microsurgical clipping was the treatment for 66.2% of the patients. Angiographic vasospasm incidence was 16.5%. At 6 months, the median GOS was 4 (IQR 0.75), and the median mRS was 3 (IQR 1.5). Twenty-one patients (15.1%) died. Neutrophil-to-lymphocyte ratio and PLR levels did not differ between favorable and unfavorable (mRS > 2 or GOS < 4) functional outcomes. No variables were significantly associated with angiographic vasospasm. Conclusion Admission NLR and PLR presented no value for prediction of functional outcome or angiographic vasospasm risk. Further research is needed in this field.

Resumo Antecedentes O prognóstico da hemorragia subaracnoidea (HSA) permanece ruim. Vasoespasmo pode estar associado à inflamação. Razões neutrófilo-linfócito (NLR) e plaqueta-linfócito (PLR) têm sido estudadas como marcadores de inflamação e prognóstico. Objetivo Investigar NLR e PLR na admissão como preditores de vasoespasmo angiográfico e desfecho aos 6 meses. Métodos Este estudo de coorte incluiu pacientes consecutivos com HSA aneurismática de um centro terciário. Contagem de leucócitos, neutrófilos, linfócitos e plaquetas, proporção de neutrófilos para linfócitos e de plaquetas para linfócitos foram coletados como variáveis independentes. Ocorrência de vasoespasmo, escala de Rankin modificada, escala de desfecho de Glasgow e o escore de Hunt-Hess na admissão e 6 meses após a mesma foram registradas como variáveis dependentes. Modelos de regressão logística multivariável foram usados para ajustar potenciais fatores de confusão e avaliar valor prognóstico independente de NLR e PLR. Resultados Um total de 74,1% pacientes eram do sexo feminino, com idade média de 55,6 ± 12,4 anos. Na admissão, a pontuação média de Hunt-Hess foi de 2 (IQR 1) e a mediana de mFisher foi de 3 (IQR 1). Clipagem microcirúrgica foi o tratamento escolhido para 66,2% dos pacientes. A incidência de vasoespasmo angiográfico foi de 16,5%. Aos 6 meses, a escala de desfecho de Glasgow mediana era 4 (IQR 0,75) e a escala de Rankin modificada mediana era 3 (IQR 1,5). Vinte e um pacientes (15,1%) morreram. Os níveis de NLR e PLR não diferiram entre resultados funcionais favoráveis e desfavoráveis (mRS > 2 ou GOS < 4). Nenhuma variável foi significativamente associada ao vasoespasmo angiográfico. Conclusão Razão neutrófilo-linfócito e a PLR não apresentaram valor preditivo de desfecho funcional ou risco de vasoespasmo angiográfico. Mais pesquisas são necessárias neste campo.

Abstract The objective was to evaluate technical-tactical learning and student involvement through the implementation of a Didactic Unit (DU) for handball teaching using a hybrid model composed of the principles of the Teaching Games for Understanding (TGfU) and the Sport Education Model (SEM). This qualitative study is based on action research and it is divided into four phases: I) the identification of the initial situation, with semi-structured interviews to teachers and a closed questionnaire to students; II) planning of a DU; III) development/implementation of the DU and research data collection; and IV) research data analysis. The DU teaches 17 lessons in a ninth-grade class of elementary education in a public school in Brazil. As a result, throughout the sports season the affiliated teams progressed in levels of play, from the anarchic/decentralized phase to the structured phase, and in the behavioral aspects, engagement, group work, understanding, relaxed atmosphere and joy were observed as frequent. The hybrid model is an option to promote the engagement of students in classes aimed at teaching handball, as it promoted the learning of technical-tactical aspects and also the student motivation observed by behaviors related to social cohesion and task. The hybrid model confirmed its relevance for the development of a sport education suited to the school reality, especially in public schools.

Resumo O objetivo do presente estudo foi avaliar o aprendizado técnico-tático e o envolvimento dos alunos por meio da implementação de uma Unidade Didática (UD) para o ensino do handebol utilizando-se de um modelo híbrido composto por princípios do Teaching Games for Understanding (TGfU) e do Sport Education Model (SEM). Trata-se de estudo qualitativo baseado em pesquisa-ação e dividido em quatro fases: I) identificação da situação inicial, com entrevista semi-estruturada com a professora e questionário fechado para estudantes; II) planejamento da UD; III) desenvolvimento/aplicação da UD e coleta dos dados da pesquisa e IV) análise dos dados da pesquisa. A UD foi composta de 17 aulas de uma turma de 9º do Ensino Fundamental de uma escola pública brasileira. Como resultado, as equipes filiadas ao longo da temporada esportiva progrediram nos níveis de jogo, da fase anárquica/descentralizada para a fase estruturada, e nos aspectos comportamentais os elementos engajamento, trabalho em grupo, compreensão, ambiente descontraído e a alegria foram observados como frequentes. O modelo híbrido é uma opção para promover o engajamento dos alunos nas aulas voltadas ao ensino do handebol, pois promoveu o aprendizado de aspectos técnico-táticos e também a motivação dos alunos observada por comportamentos relacionados à coesão social e tarefa. O modelo híbrido confirmou sua relevância para o desenvolvimento do ensino do esporte adequado à realidade escolar, principalmente nas escolas públicas.

Abstract Objective: To assess the predictive value of selected growth phenotypes for neonatal morbidity and mortality in preterm infants < 30 weeks and to compare them with INTERGROWTH-21st (IG21). Methods: Retrospective analysis of data from the Brazilian Neonatal Research Network (BNRN) database for very low birth weight (VLBW) at 20 public tertiary-care university hospitals. Outcome: the composite neonatal morbidity and mortality (CNMM) consisted of in-hospital death, oxygen use at 36 weeks, intraventricular hemorrhage grade 3 or 4, and Bell stage 2 or 3 necrotizing enterocolitis. Selected growth phenotypes: small-for-gestational-age (SGA) defined as being < 3rd (SGA3) or 10th (SGA10) percentiles of BW, and large-for-gestational-age (LGA) as being > 97th percentile of BW. Stunting as being < 3rd percentile of the length and wasting as being < 3rd percentile of BMI. Single and multiple log-binomial regression models were fitted to estimate the relative risks of CNMM, comparing them to IG21. Results: 4,072 infants were included. The adjusted relative risks of CNMM associated with selected growth phenotypes were (BNRN/IG21): 1.45 (0.92–2.31)/1.60 (1.27–2.02) for SGA; 0.90 (0.55–1.47)/1.05 (0.55–1.99) for LGA; 1.65 (1.08–2.51)/1.58 (1.28–1.96) for stunting; and 1.48 (1.02–2.17) for wasting. Agreement between the two references was variable. The growth phenotypes had good specificity (>95%) and positive predictive value (70-90%), with poor sensitivity and low negative predictive value. Conclusion: The BNRN phenotypes at birth differed markedly from the IG21 standard and showed poor accuracy in predicting adverse neonatal outcomes.

ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

RESUMO Objetivo: Mapear as tecnologias educativas implementadas para prevenção do HIV em negros. Método: Revisão de escopo, realizada conforme as recomendações do The Joanna Briggs Institute, nas bases de dados Medline/PubMed, Embase, LILACS, CINAHL, Scopus, Cochrane e PsycINFO, utilizando-se do instrumento Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR). Resultados: Encontraram-se 14 estudos publicados entre 1999 e 2020. Os principais impactos para saúde dos negros envolveram a redução das taxas de relações sexuais desprotegidas, o maior uso de preservativos, a diminuição de comportamentos de risco, a minimização do número de parceiros, a maior solicitação de testagens para HIV e o aumento do uso de Profilaxia Pré-exposição (PrEP). Conclusão: As tecnologias educativas mapeadas foram: workshops, cursos, mensagens, dramatização, vídeos, aplicativo, panfleto, campanhas de mídia e de rádio, grupos de Facebook, site, programas de computadores e softwares multimídia.

ABSTRACT Objective: To map the educational technologies implemented for HIV prevention in black people. Method: Scope review, performed according to the recommendations of The Joanna Briggs Institute, in Medline/PubMed, Embase, LILACS, CINAHL, Scopus, Cochrane and PsycINFO databases, using the Preferred Reporting Items for Systematic reviews and Meta- Analyses extension for Scoping Reviews (PRISMA-ScR). Results: There were 14 studies published between 1999 and 2020. The main health impacts for black people involved a reduction in rates of unprotected sex, greater use of condoms, a decrease in risky behaviors, a minimization of the number of partners, a greater request for HIV testing and an increase in the use of Pre-exposure prophylaxis (PrEP). Conclusion: The educational technologies mapped were: workshops, courses, messages, dramatization, videos, application, pamphlet, media and radio campaigns, Facebook groups, website, computer programs and multimedia software.

RESUMEN Objetivo: Mapear las tecnologías educativas implementadas para la prevención del VIH en negros. Método: Revisión de alcance, realizada de acuerdo con las recomendaciones de The Joanna Briggs Institute, en las bases de datos Medline/PubMed, Embase, LILACS, CINAHL, Scopus, Cochrane y PsycINFO, utilizando Preferred Reporting Items for Systematic reviews y Meta-Analysis extension for Scoping Reviews (PRISMA-ScR). Resultados: Se publicaron 14 estudios entre 1999 y 2020. Los principales impactos en la salud de los negros involucraron una reducción en las tasas de sexo sin protección, mayor uso de condones, una disminución en los comportamientos de riesgo, una minimización del número de parejas, una mayor solicitud de pruebas de VIH y un aumento en el uso de Pre-exposición profilaxis (PrEP). Conclusión: Las tecnologías educativas mapeadas fueron: talleres, cursos, mensajes, dramatización, videos, aplicación, folleto, campañas en medios y radio, grupos de Facebook, sitio web, programas informáticos y software multimedia.

Abstract Objective: The aim of this study was to analyze which equation best estimates maximal heart rate (HRmax) for the pediatric population according to body mass. Data source: We performed a meta-analysis (PROSPERO No. CRD42020190196) of cross-sectional studies that aimed to validate or develop HRmax equations and that had children and adolescents as samples. The search was conducted in Scopus, Science Direct, Web of Science, PubMed, and Biblioteca Virtual em Saúde with the descriptors “prediction or equation,” “maximal heart rate,” “maximum heart rate,” “determination of heart rate,” children, and adolescent. The TRIPOD Statement tool was used to assess the methodological quality and the relevant data were extracted for analysis. The meta-analysis was conducted in the Comprehensive Meta-Analysis, adopting p<0.05 and a 95% confidence interval (CI). Data synthesis: In total, 11 studies were selected, of which 3 developed predictive equations, 10 performed external validity of the preexisting models, and 1 incremented values related to equations already developed. The results of the methodological quality analysis showed a moderate rating in most studies. The 164 + (0.270 × HRres) – (0.155 × body mass) + (1.1 × METs) + (0.258 × body fat percent) (r=0.500, 95%CI 0.426–0.567, p<0.001) and 166.7+ (0.46 × HRres) + (1.16 × maturation) (r=0.540, 95%CI 0.313–0.708, p<0.001) equations presented stronger correlations with measured HRmax in nonobese adolescents. The predictive model developed by 208 – (0.7 × age) showed a greater accuracy among the possible models for analysis (SDM=-0.183, 95%CI -0.787 to -0.422, p=0.554). No specific predictive equation was found for obese adolescents. Conclusions: Future research should explore new possibilities for developing predictive equations for this population as a tool to control exercise intensity in the therapeutic management of childhood and adolescent obesity.

Resumo Objetivo: Analisar qual equação melhor estima a frequência cardíaca máxima (FCmáx) na população pediátrica conforme a massa corporal. Fontes de dados: Foi realizada uma metanálise (PROSPERO no CRD42020190196) de estudos transversais que visavam validar ou desenvolver equações da FCmáx para crianças e adolescentes. As bases de dados foram Scopus, Science Direct, Web of Science, PubMed e Biblioteca Virtual em Saúde. Utilizaram-se os descritores “prediction or equation”, “maximal heart rate”, “maximum heart rate”, “determination of heart rate”, “children” e “adolescents”. A ferramenta TRIPOD Statement foi utilizada para avaliar a qualidade metodológica e os dados relevantes foram extraídos para análise. A metanálise foi conduzida no Comprehensive Meta-Analysis, adotando-se valor de p<0,05 e intervalo de confiança de 95%. Síntese dos dados: Foram selecionados 11 estudos, dos quais três desenvolveram equações preditivas, dez realizaram a validade externa de modelos preexistentes e um a incrementação de valores relacionados com equações já desenvolvidas. Em sua maioria, os estudos foram classificados com qualidade moderada. As equações 164 + (0.270 × FCrep) – (0.155 × massa corporal) + (1.1 × METs) + (0.258 × percentual de gordura) (2017) (r=0,500; p<0,001) e 166.7+ (0.46 × FCrep + (1.16 × maturação) (r=0,540; p<0,001) apresentaram correlações mais fortes com a FCmáx medida em adolescentes não obesos. O modelo de 208 – (0.7 × idade) mostrou a maior precisão entre os modelos possíveis para análise (SDM=-0,183; p=0,554). Não foi encontrada nenhuma equação preditiva específica para adolescentes obesos. Conclusões: Pesquisas futuras devem explorar novas possibilidades de desenvolvimento de equações preditivas para essa população, uma vez que elas são uma ferramenta para controlar a intensidade do exercício na gestão terapêutica da obesidade infantil e do adolescente.

ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

RESUMEN Introducción: La inactividad física en adolescentes es uno de los problemas actuales que ha cobrado relevancia, debido a que investigaciones proyectan hábitos de vida no saludables en la adultez. Es por ello, que instancias públicas y privadas buscan romper con esta mala práctica. Esto estimula a investigar sobre los actores que interactúan de forma continua con los adolescentes, de tal manera que los motive a entrar a un entorno que promueva la realización de actividades físicas. Objetivo: Evaluar la influencia de los modelos sociales que influyen en la realización de actividades físicas y en la salud de los estudiantes del nivel secundario en República Dominicana. Métodos: El estudio fue realizado en base a un enfoque cuantitativo descriptivo de corte transversal mediante encuesta, empleando el muestreo no probabilístico por conveniencia, debido a la disponibilidad mostrada por la población objeto de estudio al llenado del instrumento. La población estuvo integrada por 777 estudiantes, quienes brindaron las informaciones relativas al índice de actividad física y modelos sociales que influyen a su práctica. En la investigación se utilizó Cuestionario Internacional sobre el Estilo de Vida del Alumnado. Resultados: Los datos alcanzados muestran altos niveles de sedentarismo sobrepasando el 83 % en ambos sexos, con mayor presencia en las mujeres. En lo concerniente a los modelos sociales que tributan a la práctica de actividad física, se reafirman los padres y las amistades como los más influyentes. Conclusiones: Existen altos niveles de sedentarismo chicos y chicas adolescentes contrastado con la influencia positiva que reciben de padres y amigos para la realización de actividad física, lo cual puede ser utilizado con el objetivo de crear proyectos que incentiven la práctica de actividad físico-deportiva y contribuyan a la prevención de las enfermedades no transmisibles.

ABSTRACT Introduction : Physical inactivity in adolescents is one of the current problems that has gained relevance, due to the fact that research projects unhealthy lifestyle habits in adulthood in this age group. For this reason, public and private instances seek to break this bad practice. The aforementioned, stimulates research on the actors that interact continuously with adolescents, in such a way that motivates them to enter an environment that promotes physical activities. Objective: To evaluate the impact of social models that influence the performance of physical activities and the health of secondary school students in the Dominican Republic. Methods: The present study was carried out based on a cross-sectional, descriptive quantitative approach by means of a survey, using non-probabilistic sampling by convenience, due to the availability shown by the population under study when filling out the instrument. The population consisted of 777 students, who provided information on the rate of physical activity and social models that influence its practice. The International Student Lifestyle Questionnaire was used in the research. Results: The data obtained show high levels of sedentary lifestyles, exceeding 83% in both sexes, with a greater presence in women. Regarding the social models that contribute to the practice of physical activity, parents and friends are reaffirmed as the most influential. Conclusions: There are high levels of sedentary adolescent boys and girls contrasted with the positive influence they receive from parents and friends for the practice of physical activity, which can be used with the aim of creating projects that encourage the practice of physical-sports activities and contribute to the prevention of non-communicable diseases.

Resumo O nemátode das lesões radiculares, Pratylenchus penetrans, é um dos fitoparasitas mais destrutivo, responsável por perdas a nível mundial num significativo número de plantas hospedeiras. O controlo químico destes organismos baseia-se em fumigantes e não fumigantes, que providenciam uma protecção sistémica. Tais métodos de controlo são dispendiosos e prejudiciais quer para o ambiente quer para os humanos. Os compostos produzidos naturalmente pelas plantas poderão desempenhar um papel importante no controlo de nemátodes. A actividade nematicida de 8 compostos que ocorrem naturalmente em plantas, de duas classes de compostos, foi avaliada a 2 mg/mL durante 24 h. Os ensaios foram efectuados segundo a metodologia de contacto directo usualmente empregue. P. penetrans revelou-se extremamente insensível aos compostos testados com valores de mortalidade compreendidos entre 1.0 e 5.8%. No nosso conhecimento, a actividade nematicida de 4 compostos fenólicos (catequina, ácido cafeico, ácido gálico e ácido gentísico) foi testada pela primeira vez em P. penetrans.

Abstract The root lesion nematode, Pratylenchus penetrans, is one of the most harmful plant parasites, responsible for worldwide productivity losses in a significant number of plant hosts. Generally, chemical control relies on synthetic compounds used through fumigation or direct contact, which offers a systemic protection. These control methods are costly and hazardous to the environment and to humans. Phytochemicals may play an important role in nematode control. The nematicidal activity of eight compounds that occur naturaly in plants, from two classes of compounds, was assessed at 2 mg/mL, for 24 h. Bioassays were performed following the standard direct contact methodology. P. penetrans was remarkably tolerant to the tested compounds, with mortality range between 1.0 and 5.8 %. To the best of our knowledge, the nematicidal activity of 4 phenolic compounds (catechin, caffeic acid, gallic acid and gentisic acid) was evaluated for the first time for P. penetrans.

Resumen Este artículo analiza la dependencia y el impacto del precio del petróleo (WTI), del oro (XAU) y la volatilidad del mercado de valores (VIX) sobre precio del Bitcoin (BTC) en el periodo de febrero de 2012 a septiembre de 2021 por medio de un modelo GARCH multivariado de tipo diagonal BEKK, con la intención de probar que existe un efecto de derrame de volatilidad entre las variables. Bajo la agrupación de tres pares (BTC-VIX, BTC-WTI y BTC-XAU), los hallazgos confirman la presencia del efecto y para su determinación actual, los choques rezagados en un periodo tienen especial relevancia en la relación BTC - VIX. En cuanto a la volatilidad anterior la mayor dependencia se da en el par BTC - XAU. Por su parte, la correlación condicional dinámica es negativa entre el BTC y el índice VIX puesto que los inversionistas buscan cubrirse del riesgo con la compra de otros activos ante la incertidumbre en algún mercado.

Abstract This paper analyzes the dependence and the impact of oil (WTI) and gold (XAU) prices, in addition to stock market volatility (VIX) over Bitcoin prices (BTC) from February 2012 to September 2021 through a multivariate GARCH model type diagonal BEKK, with the intention to prove the existence of a volatility spillover between such variables. Under the grouping of three pairs (BTC-VIX, BTC-WTI y BTC-XAU), findings confirm the presence of such effect and for its current determination, certain period lagging shocks have a special relevance in the relationship BTC - XAU. On the other hand, the dynamical conditional correlation is negative between the BTC and VIX index since investors seek to hedge against risk with the purchase of other assets in the face of uncertainty in a market.