Experiences and implications of promoting healthy eating in school aged children by World Health Organization / 中国学校卫生

Abstract@#In order to promote the high quality development of school meals, the article systematically analyzes the Policy Report on Promoting Healthy Meals in Schools issued by World Health Organization (WHO), introduces ways of changing the physical environment of meals and adjusting the provision of dietary information, clarifies the five steps of basic research-goals setting-action plans-implementation-impact evaluation, and points out that the development of school meals in China is facing the realistic difficulties such as unreasonable school nutrition structure, unbalanced nutrition supply, low nutritional awareness of students and serious double malnutrition burden. The paper puts forward the enlightenment of reasonable use of nudge to help students develop scientific eating habits, strengthen school health education, and reduce students double burden of malnutrition.

Association between dietary rhythm and depressive symptoms in adolescents / 中国学校卫生

Objective@#To describe the prevalence and association of dietary rhythm and depressive symptoms among adolescents, so as to provide a basis for improving unhealthy behavioral habits,and to promote adolescent physical and mental health.@*Methods@#From October to December 2021, a total of 22 868 students were selected from one middle school and high school in urban and rural areas of eight cities, namely, Shenyang, Xuzhou, Shenzhen, Taiyuan, Nanchang, Zhengzhou, Chongqing, and Kunming cities, China, using a combination of purposive sampling and stratified cluster random sampling. A self administered questionnaire was used to assess adolescents dietary rhythm, and the Patient Health Questionnaire-9 (PHQ-9) was used to assess depressive symptoms. Binary Logistic regression model was employed to analyze the associations between adolescent dietary rhythm and depressive symptoms, while the associations between adolescent dietary rhythm and depressive symptoms across gender and physical activity levels were stratified by gender and physical activity levels.@*Results@#The detection rate of depressive symptoms in adolescents was 44.4%. The respective differences in the detection rates of depressive symptoms among adolescents of different genders, physical activity levels, and dietary rhythm disorders were statistically significant ( χ 2=157.51, 105.02, 3 282.50, P <0.01). Taking the low disordered dietary rhythm group as the reference, binary Logistic regression analyses showed that after adjusting for confounding factors such as age, gender，family location, family economic situation, whether only child, parental education level, and learning burden, physical activity levels, depressive symptoms were positively correlated with adolescents in the moderate disordered dietary rhythm group ( OR=2.63, 95%CI =2.45-2.83) and the high disordered dietary rhythm group ( OR=6.38, 95%CI = 5.93- 6.86). In addition, after stratifying by gender, dietary rhythm were positively correlated with depressive symptoms. The moderate disordered group (male: OR=2.62, 95%CI =2.37-2.89, female: OR=2.67, 95%CI =2.40-2.97) and the highly disordered group (male: OR=5.74, 95%CI =5.19-6.35, female: OR=7.11, 95%CI =6.40-7.89) were positively correlated with depressive symptoms. After stratification by physical activity levels, low, moderate and above physical activity levels among adolescents in the disordered dietary rhythm group (low physical activity: OR=2.91, 95%CI =2.58-3.29, moderate and above physical activity: OR= 2.50, 95%CI =2.28-2.74), high disordered group (low physical activity: OR=6.51, 95%CI =5.94- 7.13 , moderate and higher physical activity: OR=6.18, 95%CI =5.47-6.97) were positively associated with depressive symptoms ( P <0.01). There was an interaction between dietary rhythm and physical activity levels in regard to the development of depressive symptoms in adolescents, taking the group with moderate and above physical activity levels and low disordered dietary rhythm as the reference,the detection rate of which was higher in adolescents with low levels of physical activity and those in the moderate or high disordered dietary rhythm group ( OR=1.50, 3.90, 95%CI=1.39-1.61, 3.63-4.19, P <0.01).@*Conclusions@#Dietary rhythm disorders were found to be positively associated with depressive symptoms in adolescents. Regular dietary behaviors and increased physical activity play an important positive role in promoting adolescent mental health.

Focus on the dietary behaviors and mental health among multi ethnic adolescents / 中国学校卫生

Abstract@#Unhealthy eating behaviors among adolescents are common, and psychological behavior problems are prominent. The paper examines the status and associations underlying unhealthy eating behaviors and psychological behavior problems in adolescents from border multi ethnic areas, and further discusses the importance of research in border area involving multi ethnic adolescents, and highlights its significance in the context of constructing healthy schools in border areas,so as to provide a basis for promoting effectively healthy school environments in border areas of China.

Association between latent classes of dietary patterns and depressive symptoms among firstgrade students from multi ethnic middle schools in Yunnan Province / 中国学校卫生

Objective@#To determine the latent class of dietary patterns and their association with depressive symptoms among first grade students from multi ethnic middle schools in Yunnan Province, so as to provide a reference basis for promoting mental health among border middle school students.@*Methods@#A cluster random sampling involving 8 500 first grade middle school students from 11 counties in Yunnan Province was conducted by a questionnaire survey between October to December 2022. The Children s Depression Inventory (CDI) was used to assess the depressive symptoms and the Food Frequency Questionnaire was used to collect eating behavior data. The latent profile analysis model was used to fit the latent class of dietary patterns among students. The association between the dietary pattern latent class and depressive symptoms was analyzed by Logistic regression.@*Results@#The depressive symptom detection rate among firstgrade middle school students was 28.3%. Prevalence of depressive symptom in girls (30.9%) was higher than boys (25.5%) with a statistically significant difference ( χ 2=29.83, P <0.01). The dietary patterns among first grade middle school students were classified into four latent classes, as follows:class 1 (low consumption of all dietary components), class 2 (high consumption of fruit, milk and dairy products), class 3 (high consumption of vegetables and meat, and low consumption of processed foods) and class 4 (low consumption of milk, dairy products and eggs, and high consumption of processed foods). After adjusting for confounding variables, the class 3 dietary pattern was negatively correlated with depressive symptoms ( OR=0.62, 95%CI =0.52-0.74) and the class 4 dietary pattern was positively correlated with depressive symptoms ( OR= 1.28 , 95%CI =1.05-1.57) ( P <0.05), compared with the class 1 dietary pattern.@*Conclusions@#Multi ethnic first grade middle school students in Yunnan Province follow various dietary patterns. Unhealthy dietary patterns increase the risk of depressive symptoms. The dietary patterns of multi ethnic middle school students in Yunnan Province should be adjusted to promote the establishment of healthy dietary patterns and reduce the risk of depression symptoms in middle school students.

Influence of diet and exercise management combined health education mode on aged patients with chro-nic heart failure / 心血管康复医学杂志

Objective:To study influence of diet and exercise management combined health education mode on aged patients with chronic heart failure(CHF).Methods:A total of 124 aged CHF patients treated in our hospital were randomly and equally divided into routine nursing group and combined intervention group(received diet and exercise management combined health education mode intervention based on routine nursing group)according to random number table method.Both groups were intervened for two months.General clinical data,left ventricular end-sys-tolic dimension(LVESd),left ventricular end-diastolic dimension(LVEDd),LVEF,6min walking distance(6MWD)and scores of Minnesota living with heart failure questionnaire(MLHFQ)and before and after interven-tion were compared between two groups.Results:Compared with routine nursing group,after intervention,there were significant reductions in LVESd[(44.88±4.90)mm vs.(33.09±3.40)mm],LVEDd[(54.02±5.49)mm vs.(48.80±5.50)mm],scores of emotional[(17.44±4.55)scores vs.(7.89±4.54)scores],physical[(31.69 ±5.73)scores vs.(21.89±6.02)scores]and others[(32.12±4.22)scores vs.(13.00±2.84)scores]of MLH-FQ and total score[(81.25±9.28)scores vs.(42.77±8.05)scores],and significant rise in LVEF[(49.64± 4.81)％vs.(52.32±4.22)％],6MWD[(352.67±28.79)m vs.(449.38±23.82)m],scores of self-care main-tenance[(2.06±0.39)scores vs.(3.26±0.51)scores],self-care management[(6.21±1.07)scores vs.(9.65 ±1.18)scores]and self-care confidence[(1.06±0.26)scores vs.(3.12±0.56)scores]in combined interven-tion group(P=0.001 all).Conclusion:Diet and exercise management combined health education mode can signifi-cantly improve cardiac function,self-management ability and quality of life in aged patients with chronic heart failure.

How many meals and snacks do Brazilians eat a day? Findings from the 2017-2018 Brazilian National Dietary Survey / Quantas refeições e lanches os brasileiros fazem por dia? Resultados do Inquérito Nacional de Alimentação de 2017-2018 / ¿Cuántas comidas y meriendas tienen los brasileños por día? Resultados de la Encuesta Nacional de Alimentación 2017-2018

The habit of eating specific meals has been addressed in several studies, but the evaluation of meal patterns has received less attention. This study aimed to describe the meal patterns of the Brazilian population. A complex sampling design was used to select the 46,164 ≥ 10-year-old individuals examined in the Brazilian National Dietary Survey. Food consumption was assessed by two non-consecutive 24-hour recalls applied throughout a one-week period. The exploratory data analysis approach was used to determine the meal patterns, i.e., how individuals combined the main meals (breakfast, lunch, dinner) and snacks (morning, afternoon, evening/night) throughout the day. The most common meal patterns were three main meals + one snack, reported by 25.1% of the individuals, and three main meals + two snacks (24.6%). Other meal patterns identified were: three main meals + three snacks (18.5%); three main meals and no snacks (10.9%); one or two main meals + two snacks (7.4%); one or two main meals + one snack (6.9%); one or two main meals + three snacks (4.2%); and one or two main meals and no snacks (2.3%). Meal patterns varied according to gender and age group, and on typical versus atypical food consumption days. We found that eight patterns characterized the daily meal consumption in Brazil. Furthermore, around 80% of the population had three main meals every day and about 13% did not report having any snacks. The characterization of meal habits is important for tailoring and targeting health promotion actions.

Os hábitos de consumo de refeições específicas têm sido abordados em diversos estudos, no entanto, a avaliação dos padrões refeições tem recebido menos atenção. O objetivo deste estudo foi descrever os padrões de refeições da população brasileira. Um desenho amostral complexo foi utilizado para selecionar os 46.164 indivíduos de ≥ 10 anos examinados no Inquérito Nacional de Alimentação de 2017-2018. O consumo alimentar foi avaliado por meio de dois recordatórios de 24 horas não consecutivos, aplicados durante um período de uma semana. A análise exploratória de dados foi utilizada para determinar os padrões de refeições, ou seja, como os indivíduos combinam as principais refeições (café da manhã, almoço, jantar) e lanches (manhã, tarde, noite) ao longo do dia. Os padrões de refeições mais frequentes foram três refeições principais + um lanche, conforme relatado por 25,1% dos indivíduos, e três refeições principais + dois lanches (24,6%). Outros padrões de refeições identificados foram: três refeições principais + três lanches (18,5%); três refeições principais e nenhum lanche (10,9%); uma ou duas refeições principais + dois lanches (7,4%); uma ou duas refeições principais + um lanche (6,9%); uma ou duas refeições principais + três lanches (4,2%); e uma ou duas refeições principais e nenhum lanche (2,3%). Os padrões de refeições variaram de acordo com o sexo e a faixa etária, e nos dias típicos em comparação com os atípicos de consumo alimentar. Verificou-se que oito padrões caracterizaram o consumo diário de refeições no Brasil. Além disso, cerca de 80% da população realizava três refeições principais diárias e cerca de 13% reportaram não lanchar. A caracterização dos padrões de refeições é importante para adequar e direcionar ações de promoção da saúde.

Los hábitos alimenticios específicos se han abordado en varios estudios, sin embargo, poco se sabe sobre la evaluación de los patrones de alimentación. El objetivo de este estudio fue describir el patrón de alimentación de la población brasileña. Se utilizó un diseño de muestra complejo para seleccionar a 46.164 individuos de ≥ 10 años quienes participaron en la Encuesta Nacional de Alimentación 2017-2018. El consumo alimentario se evaluó mediante dos registros de 24 horas no consecutivos, aplicados durante una semana. Para determinar el patrón de alimentación, se aplicó el análisis exploratorio, es decir, cómo las personas combinan las comidas principales (desayuno, almuerzo, cena) y las meriendas (mañana, tarde, noche) a lo largo del día. Los patrones de alimentación más frecuentes fueron tres comidas principales + una merienda según informan el 25,1% de los individuos, y tres comidas principales + dos meriendas (24,6%). Otros patrones identificados destacaron tres comidas principales + tres meriendas (18,5%); tres comidas principales sin merienda (10,9%); una o dos comidas principales + dos meriendas (7,4%); una o dos comidas principales + una merienda (6,9%); una o dos comidas principales + tres meriendas (4,2%); y una o dos comidas principales sin merienda (2,3%). Los patrones de alimentación tuvieron una variación según el sexo y el grupo de edad, y en días típicos en comparación con los atípicos de consumo de alimentos. Se encontró que ocho patrones caracterizan el consumo diario de comidas en Brasil. Por lo tanto, aproximadamente el 80% de la población tienen tres comidas principales al día y aproximadamente el 13% informan que no tienen merienda. Es importante caracterizar los patrones de alimentación para adaptar y orientar las acciones de promoción de la salud.

Sodium intake according to NOVA food classification in Brazil: trends from 2002 to 2018 / Ingestão de sódio segundo a classificação NOVA no Brasil: tendências de 2002 a 2018 / Ingesta de sodio según la clasificación NOVA en Brasil: tendencias del 2002 al 2018

Abstract: Excessive sodium intake is a major global public health issue and the identification of dietary sources and temporal trends in its consumption are a key to effective sodium reduction policies. This study aims to update estimates of sodium intake and its dietary sources in Brazil according to the NOVA food classification system. Records of 7-day food purchases of households from the Brazilian Household Budgets Survey of 2002-2003, 2008-2009, and 2017-2018 were converted into nutrients using food composition tables and the mean availability was estimated per 2,000kcal/day. Mean daily sodium available for consumption in Brazilian households has increased from 3.9 to 4.7g per 2,000kcal, from 2002-2003 to 2017-2018, over twice the recommended levels of sodium intake. From 2002-2003 to 2017-2018, the processed culinary ingredients, including table salt, represented the largest dietary source of sodium, although their participation in dietary sodium was reduced by 17% (66.6% to 55%), while the percentage of dietary sodium from processed foods increased by 20.3% and from ultra-processed foods increased by 47.6% (11.3% to 13.6% and 17% to 25.1%, respectively). In conclusion, the total household sodium availability remains high and has increased over time in Brazil, yet the participation of different dietary sources of sodium have gradually changed.

Resumo: A ingestão excessiva de sódio é um dos principais problemas de saúde pública em todo o mundo e a identificação de fontes alimentares e tendências temporais no seu consumo são fundamentais para a elaboração de políticas eficazes de redução de sódio. Este estudo tem como objetivo atualizar as estimativas de ingestão de sódio e suas fontes alimentares no Brasil de acordo com o sistema de classificação NOVA. Os registros de compras de alimentos no período de 7 dias de famílias das Pesquisas de Orçamentos Familiares de 2002-2003, 2008-2009 e 2017-2018 foram convertidos em nutrientes utilizando tabelas de composição de alimentos. A disponibilidade média foi estimada em 2.000kcal/dia. A média diária de sódio disponível para consumo nos domicílios brasileiros aumentou de 3,9 para 4,7g por 2.000kcal, de 2002-2003 a 2017-2018, mais do que o dobro dos níveis recomendados de ingestão desse nutriente. De 2002-2003 a 2017-2018, os ingredientes culinários processados, incluindo o sal de cozinha, representaram a maior fonte de sódio, embora a sua participação no sódio dietético tenha sido reduzida em 17% (de 66,6% para 55%), enquanto a porcentagem de sódio dietético dos alimentos processados aumentou 20,3% e dos alimentos ultraprocessados aumentou 47,6% (11,3% para 13,6% e 17% para 25,1%, respectivamente). Concluindo, a disponibilidade total de sódio nos domicílios permanece alta e tem aumentado ao longo do tempo no Brasil, mas a participação de diferentes fontes dietéticas de sódio mudou gradualmente.

Resumen: La ingesta excesiva de sodio es uno de los principales problemas de salud pública en todo el mundo, y la identificación de las fuentes alimentarias y tendencias temporales en su consumo son esenciales para desarrollar políticas efectivas de reducción de sodio. Este estudio tiene como objetivo actualizar las estimaciones de la ingesta de sodio y sus fuentes alimentarias en Brasil según el sistema de clasificación NOVA. Los registros de compras de alimentos en el período de 7 días de familias de las Encuestas de Presupuestos Familiares de Brasil de 2002-2003, 2008-2009 y 2017-2018 se convirtieron en nutrientes utilizando tablas de composición de alimentos. La disponibilidad media se estimó en 2.000kcal/día. El promedio diario de sodio disponible para el consumo en los hogares brasileños aumentó de 3,9 a 4,7g por 2.000kcal, entre 2002-2003 y 2017-2018, más del doble de los niveles de ingesta recomendados de este nutriente. Entre 2002-2003 y 2017-2018, los ingredientes culinarios procesados, incluida la sal de mesa, representaron la mayor fuente de sodio, aunque su participación en el sodio dietético se redujo en un 17% (del 66,6% al 55%), mientras que el porcentaje de sodio dietético de los alimentos procesados aumentó un 20,3% y de los alimentos ultraprocesados aumentó un 47,6% (11,3% a 13,6% y 17% a 25,1%, respectivamente). En conclusión, la disponibilidad total de sodio en los hogares sigue siendo alta y ha aumentado a lo largo del tiempo en Brasil, pero la proporción de diferentes fuentes dietéticas de sodio ha cambiado gradualmente.

Review of the diet of Icterus pustulatus (Passeriformes: Icteridae) and a new prey, Oiketicus sp. (Lepidoptera: Psychidae) from Mexico

We report a case of predation on the basket worm Oiketicus sp. (Lepidoptera, Psychidae) by the Streak-backed Oriole (Icterus pustulatus) in the Municipality of Santa Cruz Xoxocotlán, Oaxaca, Mexico. The bird was photographed, and we describe the prey based on its basket, cephalic capsule, and fragments of thoracic segments. We describe the foraging strategy and provide a list of previously recorded food resources in the diet of I. pustulatus. This is the first documentation of a basket worm being consumed by I. pustulatus, which may be considered omnivorous.

Reportamos un caso de depredación sobre el gusano canasta Oiketicus sp. (Lepidoptera, Psychidae) por la calandria dorso rayado (Icterus pustulatus) en el Municipio de Santa Cruz Xoxocotlán, Oaxaca, México. El ave fue fotografiada y describimos la presa a partir de su canasta, cápsula cefálica y fragmentos de segmentos torácicos. Describimos la estrategia de forrajeo y presentamos una lista de recursos alimentarios previamente registrados en la dieta de I. pustulatus. Esta es la primera documentación de alimentación de un gusano canasta por parte de I. pustulatus, el cual puede ser considerada omnivora.

Relationship between food environment, social isolation and diet quality in Brazil / Relación entre el entorno alimentario, el aislamiento social y calidad de la dieta en Brasil. Introducción

Introduction. The COVID-19 pandemic has impacted diet quality in differentways. In this context, community, organizational and consumer nutrition environments can influence the eating pattern. Objective. The purpose of this study was to identify how quarantine during the COVID-19 pandemic changed the diet in Brazil. Materials and methods. A natural experiment organized into experimental (social-isolated group - SIG) and control groups (non-isolated group - CG) was conducted with data collection from an online survey at the beginning of the pandemic (T0) and in the less restrictive period of 2020 (T1). Pre-post improvements in diet quality (IDQ) were determined for the SIG and CG. Intro-intergroup changes were tested using the Mann­Whitney and Wilcoxon signed rank tests. The intervention effect was estimated using crude and adjusted difference- indifference in multilevel regression analysis accounting for repeated measures. Results. A sample of 565 Brazilian adults answered the questionnaire at T0 and T1. IDQ was favored twice or more by attitudes such as buying food directly from farmers/street markets, reducing requests for food delivery, and increasing time spent on eating activities and the frequency of cooking. The isolated group had no IDQ at T1, whereas the no isolated group, who worsened diet quality (6.1%) at T0, improved it at T1 (4.8%). Conclusions. The restrictive quarantine forced the non-isolated population to have an experience comparable to a food desert, negatively affecting their diet(AU)

COVID-19 ha impactado la calidad de la dieta de diferentes maneras. Los entornos comunitarios, organizacionales y nutricionales de los consumidores pueden influir en los patrones dietéticos. Objetivo. el objetivo de este estudio fue identificar cómo la cuarentena durante la pandemia de COVID-19 cambió la dieta en Brasil. Materiales y métodos. Se realizó un experimento natural organizado en grupos experimental (grupo socialmente aislado - SIG) y control (grupo no aislado - GC) con datos recolectados en una encuesta en línea al inicio de la pandemia (T0) y en el momento menos restrictivo de 2020 (T1). Se determinaron mejoras pre-post en la calidad de la dieta (IDQ) para SIG y GC. Los cambios intra-intergrupo se probaron utilizando las pruebas de rangos con signos de Mann-Whitney y Wilcoxon. El efecto de la intervención se estimó utilizando diferencias crudas y ajustadas en el análisis de regresión multinivel, teniendo en cuenta medidas repetidas. Resultados. Una muestra de 565 adultos brasileños respondió el cuestionario en T0 y T1. IDQ se vio favorecido dos o más veces por actitudes como comprar alimentos directamente de los agricultores/mercados callejeros, reducir los pedidos de entrega de alimentos y aumentar el tiempo dedicado a las actividades alimentarias y la frecuencia de cocinar. El grupo aislado no mostró IDQ en T1, mientras que el grupo no aislado, que tenía peor calidad de la dieta (6,1%) en T0, mejoró en T1 (4,8%). Conclusiones. La cuarentena restrictiva obligó a la población no aislada a tener una experiencia comparable a un desierto alimentario, afectando negativamente su dieta(AU)

Association of dietary behavior with nonalcoholic fatty liver disease / 临床肝胆病杂志

The prevalence rate of nonalcoholic fatty liver disease (NAFLD) is increasing year by year, which poses a heavy burden on global public health. The pathogenesis of NAFLD is closely associated with the factors including obesity, insulin resistance, and diet, among which diet is the core and cornerstone of the prevention and treatment of NAFLD. In view of the fact that previous studies focused on the association of different dietary components, structures, and plans with NAFLD and seldom explored the impact of overall dietary behavior on NAFLD, this article reviews the effect of dietary behavior on NAFLD, in order to provide a reference for the prevention and treatment of NAFLD and the guidance on rational dietary behaviors and habits for patients.

Effects of a ketogenic diet combined with resistance training on body composition and glucolipid metabolism in the obese and female college students / 中国学校卫生

Objective@#To investigate the effects of a ketogenic diet (KD) alone and in combination with resistance training (KD+RT) on body composition and glucolipid metabolism of obese and female college students, and to provide a theoretical basis for the application of KD+RT in obese patients.@*Methods@#Totally 45 obese and female college students in Wuyi University were recruited and randomly divided into KD group ( n =23) and KD+RT group ( n =22) in September 2021. After received training for 4 weeks, the changes of body composition and glucose and lipid metabolism of obese and female college students were compared before and after intervention.@*Results@#Both a 4 week KD and KD+RT led to decreases in weight, BMI, body fat mass, body fat percentage, waist to hip ratio, visceral fat area of obese female college students ( t =16.19, 16.21, 12.42, 7.99, 2.10, 6.37; 18.82, 18.02, 17.80, 10.72, 3.41, 7.59, P <0.01). The change of muscle mass was decreased in KD group( t=4.12, P <0.01), but there was no statistically significant difference in KD+RT group( P >0.05). Both a 4 week KD and KD+RT significantly reduced the levels of the fasting blood glucose, fasting insulin, glycosylated hemoglobin and triglyceride (TG) of obese female college students ( t =10.15, 8.94 , 6.94, 7.63; 9.23, 12.75, 9.85, 9.09, P <0.01), and increased the high density lipoprotein (HDL) level( t =-7.36, -5.22, P <0.01). However, only KD+RT group had a significant decrease in the level of LDL ( t =5.27, P <0.01), and there was no significant change in the level of TC both groups ( P >0.05). After the intervention, there was no statistically significant difference between the KD+RT group compared to the KD group ( P >0.05), except for a significant decrease in triacylglycerol ( t =2.51, P < 0.05 ).@*Conclusion@#Both a short term KD and KD+RT show beneficial changes in body composition and glucolipid metabolism in obese female college students. However, the KD+RT is superior to a KD in maintaining muscle mass and reducing the effects of lipid metabolism.

Research progress on the effects of meal timing and frequency for overweight and obesity among children and adolescents / 中国学校卫生

Abstract@#The prevalence of overweight and obesity among children and adolescents in China is increasing during recent years, which could be influenced by multiple factors such as genetics, diet and lifestyle. To understand the relationship between meal timing, frequency with childhood overweight and obesity, the paper reviews recent studies on the relationship between meal or snack timing, frequency with overweight and obesity among children and adolescents, so as to provide scientific evidence for obesity prevention and control.

Relationship between physical fitness and energy balance related behaviors of primary school students in Shaanxi Province / 中国学校卫生

Objective@#To explore the relationship between physical fitness and energy balance related behaviors (EBRBs), and their influencing factors among primary school students, so as to provide a scientific basis for the improvement of physical fitness in primary school students.@*Methods@#By using a random sampling method, a total of 1 451 pupils aged 10-12 were selected from 8 regions of Shannxi Province (Fengxiang, Weibin, Danfeng, Shangzhou, Huazhou, Linwei, Gaoling, Weiyang). According to the total score of physical fitness test, pupils were divided into the excellent good physical fitness group and the pass failed group. The students EBRBs and their influencing factors were investigated cross sectionally, and the Mann-Whitney U test and stepwise linear regression analysis were used to explore the relationship between physical fitness and EBRBs.@*Results@#Breakfasts behavior( r = 0.061 ) and physical activity behavior( r =0.105) among primary school students were positively correlated with total physical scores, with the excellent good physical fitness group (757.56, 768.57)were higher than that of the pass failed group(710.93, 705.67) ( Z= -2.41, -2.69, P <0.05). The screen behavior ( r =-0.065) was negatively correlated with the total physical fitness scores, with the excellent good physical fitness group (681.96) was significantly lower than the pass failed group(747.04) ( Z=2.78, P < 0.05 ). There was no statistically significant correlation between the frequency of beverage behavior and the total score of physical fitness ( P >0.05). The excellent good physical fitness group scored(762.22, 761.19, 758.82, 756.00, 761.20, 755.57, 761.52, 759.48, 781.78) higher than the pass failed group(708.70, 709.19, 710.32, 711.67, 709.19, 711.88, 709.04, 710.01, 699.36) including health beliefs, parental norms and parental role models for breakfast behaviors, and preferences, self efficacy, and self regulation for physical activities, as well as self efficacy, parental role models, family rules for screen behavior ( Z=-2.40, -2.78, -2.35, -2.48, -2.52, -2.27, -2.35, -2.22, -3.65, P <0.05).@*Conclusion@#The physical fitness of primary school students is affected by EBRBs. Parents should model positive behaviors in the family, promote the health behavior of primary school students, improve the physical health of primary school students health.

Relationship between physical fitness and energy balance related behaviors of primary school students in Shaanxi Province / 中国学校卫生

Objective@#To explore the relationship between physical fitness and energy balance related behaviors (EBRBs), and their influencing factors among primary school students, so as to provide a scientific basis for the improvement of physical fitness in primary school students.@*Methods@#By using a random sampling method, a total of 1 451 pupils aged 10-12 were selected from 8 regions of Shannxi Province (Fengxiang, Weibin, Danfeng, Shangzhou, Huazhou, Linwei, Gaoling, Weiyang). According to the total score of physical fitness test, pupils were divided into the excellent good physical fitness group and the pass failed group. The students EBRBs and their influencing factors were investigated cross sectionally, and the Mann-Whitney U test and stepwise linear regression analysis were used to explore the relationship between physical fitness and EBRBs.@*Results@#Breakfasts behavior( r = 0.061 ) and physical activity behavior( r =0.105) among primary school students were positively correlated with total physical scores, with the excellent good physical fitness group (757.56, 768.57)were higher than that of the pass failed group(710.93, 705.67) ( Z= -2.41, -2.69, P <0.05). The screen behavior ( r =-0.065) was negatively correlated with the total physical fitness scores, with the excellent good physical fitness group (681.96) was significantly lower than the pass failed group(747.04) ( Z=2.78, P < 0.05 ). There was no statistically significant correlation between the frequency of beverage behavior and the total score of physical fitness ( P >0.05). The excellent good physical fitness group scored(762.22, 761.19, 758.82, 756.00, 761.20, 755.57, 761.52, 759.48, 781.78) higher than the pass failed group(708.70, 709.19, 710.32, 711.67, 709.19, 711.88, 709.04, 710.01, 699.36) including health beliefs, parental norms and parental role models for breakfast behaviors, and preferences, self efficacy, and self regulation for physical activities, as well as self efficacy, parental role models, family rules for screen behavior ( Z=-2.40, -2.78, -2.35, -2.48, -2.52, -2.27, -2.35, -2.22, -3.65, P <0.05).@*Conclusion@#The physical fitness of primary school students is affected by EBRBs. Parents should model positive behaviors in the family, promote the health behavior of primary school students, improve the physical health of primary school students health.

Relationship between physical fitness and energy balance related behaviors of primary school students in Shaanxi Province / 中国学校卫生

Objective@#To explore the relationship between physical fitness and energy balance related behaviors (EBRBs), and their influencing factors among primary school students, so as to provide a scientific basis for the improvement of physical fitness in primary school students.@*Methods@#By using a random sampling method, a total of 1 451 pupils aged 10-12 were selected from 8 regions of Shannxi Province (Fengxiang, Weibin, Danfeng, Shangzhou, Huazhou, Linwei, Gaoling, Weiyang). According to the total score of physical fitness test, pupils were divided into the excellent good physical fitness group and the pass failed group. The students EBRBs and their influencing factors were investigated cross sectionally, and the Mann-Whitney U test and stepwise linear regression analysis were used to explore the relationship between physical fitness and EBRBs.@*Results@#Breakfasts behavior( r = 0.061 ) and physical activity behavior( r =0.105) among primary school students were positively correlated with total physical scores, with the excellent good physical fitness group (757.56, 768.57)were higher than that of the pass failed group(710.93, 705.67) ( Z= -2.41, -2.69, P <0.05). The screen behavior ( r =-0.065) was negatively correlated with the total physical fitness scores, with the excellent good physical fitness group (681.96) was significantly lower than the pass failed group(747.04) ( Z=2.78, P < 0.05 ). There was no statistically significant correlation between the frequency of beverage behavior and the total score of physical fitness ( P >0.05). The excellent good physical fitness group scored(762.22, 761.19, 758.82, 756.00, 761.20, 755.57, 761.52, 759.48, 781.78) higher than the pass failed group(708.70, 709.19, 710.32, 711.67, 709.19, 711.88, 709.04, 710.01, 699.36) including health beliefs, parental norms and parental role models for breakfast behaviors, and preferences, self efficacy, and self regulation for physical activities, as well as self efficacy, parental role models, family rules for screen behavior ( Z=-2.40, -2.78, -2.35, -2.48, -2.52, -2.27, -2.35, -2.22, -3.65, P <0.05).@*Conclusion@#The physical fitness of primary school students is affected by EBRBs. Parents should model positive behaviors in the family, promote the health behavior of primary school students, improve the physical health of primary school students health.

School lunch leftovers of primary and middle school students and its influencing factors in Ningbo / 中国学校卫生

Objective@#To analyze the situation and associated factors of school lunch leftovers of primary and middle school students in Ningbo, so as to provide a basis for formulating policies to improve the quality of nutritious meals and reduce the leftover meal rates.@*Methods@#During March to May of 2022, 20 primary and middle schools were selected from 10 districts in Ningbo, and 4 443 students were selected from grade 4 to 6 of primary school and grade 1 to 3 of middle school. A questionnaire was conducted among them for the students general situation and remaining meal situation.@*Results@#The total leftover rate was 62.4%, 7.9% of the students left rice every day, and 18.3% of the students left vegetables every day. The frequency of primary school students leftover food was lower than that of junior high school students ( χ 2=-2.18, P <0.05). Most of the students (68.3%) had only a little leftover food, half of the students (49.4%) had less than half leftovers, and the proportion of primary school students with large leftover food and leftovers was smaller than that of junior high school students ( χ 2=-2.05, -2.36, P <0.05). The main reason for students leftover food was "too much to eat" (accounting for 30.6%), and there was a statistical difference between primary school students and junior high school students in the composition of leftover food and leftovers ( χ 2=16.94, 14.28, P <0.05). The leftover rate of vegetables was the highest (54.5%) and the leftover rate of milk was the lowest (2.5%). Multivariate Logistic regression model showed that nutrition and food related courses during recent year, being aware the Chinese residents dietary guidelines, statisfaction with canteen food (general, more satisfied, very satisfied), reckoning school canteen food better than home food (almost, better than home) were less possibility to have leftover meals ( OR=0.79, 0.73, 0.57, 0.41, 0.26, 0.69, 0.82, P <0.05). Students chosed the meal after the teacher served the meal, the teacher divided meals and students who ate more frequently (4-6 times/week, 1 time/d, 2 times/d, ≥3 times/d) were more likely to have leftover meals ( OR=1.64, 2.23, 1.27, 1.21, 1.52, 1.44 , P < 0.05).@*Conclusion@#More than half of the students have leftovers. It should optimize the configuration of nutrition lunch, strengthen the education of nutrition knowledge and reduce the leftovers rate.

A study on oral health status and behaviors of Chinese college students / 中国学校卫生

Abstract@#Oral diseases are the most important public health problems that have not received due attention, especially among college students. Based on the analysis of literatures on oral health status and behaviors of college students, the paper systematically summarizes the relevant research situation, points out the existing problems. Suggestions and countermeasures, such as attaching importance to the investigation and research on oral health of college students, improving the quality and level of scientific research on oral health of college students, exploring more effective comprehensive intervention measures for oral diseases and oral health education, should be implemented as projects are put forward, so as to provide basis for improving the oral health status of Chinese college students and promoting relevant research level.

Focus on dietary behaviors and health among school aged children in western China / 中国学校卫生

Abstract@#Children s school aged time is the key period for the formation of dietary behaviors and the dietary behaviors is affected by economic, social, cultural, family, and personal factors. Due to economic, geographical, and food culture reasons, there exists several nutritional problems in western China, such as lack of nutrition health education and poor food environment. These problems may lead to suboptimal dietary behaviors of school aged children, including but not limited to having single breakfast food and unhealthy snacks and drinks. The unhealthy dietary behaviors may further hinder the growth of children in western China. Experiences and lessons should be drawn from various effective interventions developed in other regions in China. It is necessary to develop a local adapted comprehensive intervention program which incorporates the aspects of policies and laws, nutritious meals, school nutrition health education, and social nutrition health atmosphere.

Fast food consumption behaviors among senior primary school students in agricultural and pastoral areas of Qinghai Province / 中国学校卫生

Objective@#To investigate fast food consumption behaviors among 4th and 5th grade primary school students in agricultural and pastoral areas in Qinghai Province, and to provide scientific basis for nutrition education and intervention measures for school age children in agricultural and pastoral areas.@*Methods@#Using multi stage stratified cluster random sampling method, a total of 969 fourth and fifth grade students were selected from 10 primary schools in 4 counties and districts in 3 cities of Haidong City, Hainan Prefecture and Haixi Prefecture from Qinghai Province. Self administered questionnaires were used to investigate the fast food consumption behaviors of participants.@*Results@#The proportions of senior primary school students in agricultural and pastoral areas of Qinghai Province who had consumed western fast food and traditioal fast food in the past week were 45.8% and 75.6%, respectively, with statistically significant differences ( χ 2=290.24, P <0.05). The times of traditional fast food consumption in the past week among boarding students were higher than that of non boarding students( Z =6.44,5.84, P <0.05). The main reasons for senior primary school students in agricultural and pastoral areas of Qinghai Province to choose to consume western fast food were that it was delicious (84.7%), nutritious (62.6%), clean and hygienic (57.4%), and a better environment (57.0%). The top 4 reasons for chousing Chinese fast food were yummy(83.8%),nutritious(82.8%),clean and healthy(67.4%),and good environment(53.5%). Among the surveyed primary school students, 64.7% believed that diet structure of Chinese fast food was reasonable, 43.0% believed that the nutritional value of Chinese fast food was high, and 39.4% believed that the energy content of western fast food was high.@*Conclusion@#Fast food consumption is a common dietary behavior of senior primary school students in agricultural and pastoral areas of Qinghai Province. Relevant departments should strengthen the nutrition education related to fast food, promote the dissemination of health knowledge, enable students to develop a good lifestyle and reduce fast food consumption.

Beverage behaviors of senior primary school students in agricultrual and pastoral areas of Qinghai Province / 中国学校卫生

Objective@#To study the consumption of beverages among senior primary school students in rural and pastoral areas of Qinghai Province, China, in order to provide evidence for the development of nutrition and intervention strategies.@*Methods@#A multi stage stratified cluster random sampling method was employed to select 969 primary school students in grades 4 and 5 from 10 schools in Hainan Autonomous Prefecture, Haixi Autonomous Prefecture and Haidong City. All participants completed a questionnaire survey on daily beverage consumption. The Chi square test was performed to compare differences in reported rates of beverage consumption among students in different groups.@*Results@#The proportion of students who consumed beverages at home, school and elsewhere were 96.9%, 64.5% and 84.9%, respectively. The most popular beverages consumed at home were milk and yogurt ( 63.1 %), tea water (53.0%), and tea drinks (52.4%). The most popular beverages consumed at school were tea(29.8%), milk and yogurt (27.8%) and tea drinks (18.4%), while the most popular beverages consumed in other places were tea drinks ( 42.0 %), carbonated drinks (38.1%) and milk and yogurt (35.0%). The top five reasons for choosing a given beverage were taste delicious (81.2%), nutritious (57.6%),healthy and clean(52.6%),many students like to drink(39.6%),family members often drink(37.7%).@*Conclusion@#The consumption of beverages was popular among students, and sugared beverages represented a large proportion of the beverages consumed. Therefore, there is an urgent need to improve the food environment and provide effective nutrition education for students, so as to encourage the consumption of healthy beverages and cultivate healthy eating behaviors.