上海市2000-2014年中小学生体质量指数变化趋势

了解2000-2014年上海市学龄儿童青少年体质量指数(BMI)的变化趋势,为儿童青少年超重、肥胖判别标准研制及预防干预提供参考.方法 选取2000,2005,2010,2014年4次全国学生体质与健康调研中7~18岁儿童青少年作为研究对象.应用最小均方(Least Mean Square,LMS)法探讨不同性别、年龄组儿童青少年BMI的变化趋势.结果 14年间学生BMI P85低年龄组差异比较小,随年龄增加差异逐渐增大,青春期后有减小的趋势,男生平均增加2.1百分点,女生平均增加1.3百分点.学生BMI增长主要集中在中等和高百分位数,尤其是P90后,差值逐渐增大.7~11,12~15岁男生在P5o后差值均逐渐增大,P95分别达2.0,3.2百分点,其中12岁男生从23.4 kg/m2增加到26.8 kg/m2,14岁女生从24.0 kg/m2增加到25.9 kg/m2.与WGOC标准相比,2014年男生BMI P85,P95均较高,而女生BMI P85 10岁之前高于WGOC标准,从11岁开始与WGOC标准基本相一致.2014年上海市7~18岁儿童青少年超重、肥胖检出率分别为15.4%,9.1%,较2000年总体均呈上升趋势,分别上升6.4,5.2百分点.结论 BMI分布高百分位的个体比低百分位个体的变化更大.在肥胖防治工作中,加强对群体BMI曲线的监测分析,对适时调整宏观调控战略意义重大.     

Racial differences in the tracking of childhood BMI to adulthood

OBJECTIVE: The possibility that there are racial differences in the patterns of BMI (kilograms per meter squared) change throughout life has not been examined. For example, the high prevalence of obesity among black women could result from a higher prevalence of obesity among black girls or because normal-weight black girls experience larger BMI increases in adolescence or adulthood than do their white counterparts. Therefore, we examined the tracking of childhood BMI into adulthood in a biracial (36% black) sample. RESEARCH METHODS AND PROCEDURES: Five- to 14-year-old children (2392) were followed for (mean) 17 years. Childhood overweight was defined as BMI > or = 95th percentile, and adult obesity was defined as BMI > or = 30 kg/m(2). RESULTS: The tracking of childhood BMI differed between whites and blacks. Among overweight children, 65% of white girls vs. 84% of black girls became obese adults, and predictive values among boys were 71% (whites) vs. 82% (blacks). These racial differences reflected contrasting patterns in the rate of BMI change. Although the initial BMI of black children was not higher than that of white children, BMI increases with age were larger among black girls and overweight black boys than among their white counterparts. In contrast, relatively thin (BMI < 50th percentile) white boys were more likely to become overweight adults than were their black counterparts. DISCUSSION: These findings emphasize the black/white differences in BMI changes with age. Because of the adult health consequences of childhood-onset obesity, early prevention should be given additional emphasis.     

中国6~17岁儿童青少年超重肥胖流行特征

目的 分析我国6~17岁儿童青少年超重肥胖流行情况,为制定肥胖防治策略提供科学依据。方法 利用"2010-2012年中国居民营养与健康状况监测"中6~17岁儿童青少年调查资料,分析我国儿童青少年超重肥胖现状。6岁儿童采用WHO 2007年推荐的分年龄性别BMI超重肥胖判定标准判定超重肥胖,7~17岁儿童青少年采用《中国学龄儿童青少年超重和肥胖预防与控制指南》中的分年龄、性别的BMI超重肥胖判定标准进行判定。结果 6~17岁儿童青少年超重率和肥胖率分别为9.6%和6.4%,其中城市儿童青少年超重率和肥胖率分别为11.0%（男生：12.8%,女生：9.0%）和7.7%（男生：9.7%,女生：5.5%）,农村儿童青少年超重率和肥胖率分别为8.4%（男生：9.3%,女生：7.4%）和5.2%（男生：6.2%,女生：4.1%）。按家庭经济收入水平分,高、中和低家庭收入儿童青少年的超重率分别为12.3%、10.7%和8.2%,肥胖率分别为8.6%、7.2%和5.7%。结论 2012年,我国6~17岁儿童青少年超重肥胖表现为城市高于农村,男生高于女生;患病率与家庭经济收入水平有关。     

Percent body fat cutoff values for classifying overweight and obesity recommended by the International Obesity Task Force (IOTF) in Korean children

OBJECTIVE: To predict the percent body fat (%BF) cutoff values corresponding to overweight and obesity recommended by the International Obesity Task Force (IOTF) in Korean children and to compare those values with the published cutoff values in Caucasian children. RESEARCH METHODS AND PROCEDURES: The sample consisted of 1083 Korean children and adolescents (555 boys and 528 girls) aged 7-18 years from 3 schools. Body mass index (BMI) and %BF using a bioelectrical impedance analyzer were measured. The classification of overweight and obesity was based on the age- and sex-specific BMI cutoff values of the IOTF guidelines. RESULTS: The predicted %BF cutoff values for overweight and obesity varied by age and sex: overweight, 17-22% in boys and 24-37% in girls; obesity, 24-30% in boys and 30-53% in girls. Those %BF cutoff values in older Korean boys tended to be lower than the published %BF cutoff values in Caucasian boys. While %BF cutoff values for overweight in Korean girls were similar to the values in Caucasian girls, %BF cutoff values for obesity in Korean girls aged 13-18 years were higher compared to cutoff values in Caucasian girls. CONCLUSION: The %BF values associated with the IOTF-recommended BMI cutoff values for overweight and obesity may require age- and sex-specific cutoff values in Korean children aged 7-18 years.     

宁夏2019年11~18岁男生营养状况与首次遗精的相关性

  目的  探索2019年宁夏地区11~18岁男生肥胖与首次遗精的相关性,为肥胖与青春期发育相关研究提供理论依据。  方法  采用分层随机整群抽样方法,于2019年选取宁夏回族自治区银川市、中卫市、吴忠市、固原市11~18岁男生5 240名,提取调查数据中身高、体重及是否发生首次遗精3个指标,计算体质量指数(BMI)来判断营养状况,采用χ2检验比较各营养状况组间差异;用概率单位回归法计算半数遗精年龄,运用U检验比较城乡组间半数遗精年龄的差异。  结果  2019年宁夏回族自治区11~18岁男生超重和肥胖率分别为15.5%和8.8%,城市男生超重肥胖检出率分别为17.8%和10.5%,乡村男生分别为12.9%和6.9%。11~18岁城市男生半数遗精年龄为14.94岁,乡村男生半数遗精年龄为15.33岁(P < 0.01)。根据营养状况分组后,消瘦组、正常体重组、超重组和肥胖组男生半数遗精年龄依次为15.61,15.10,15.05,15.05岁。  结论  宁夏地区男生营养状况与首次遗精年龄无关,但营养状况与青春期发育的关系仍需进一步探索。     

Obesity and socioeconomic status in children of Tijuana

BACKGROUND: Although obesity has been associated with socioeconomic status among Hispanics living in the United States, little is known about whether a similar association exists among Hispanics living in Mexico, particularly among those living along the U.S.-Mexico border. OBJECTIVE: To determine the prevalence of obesity and its association with socioeconomic status in Mexican schoolchildren attending public and private schools in Tijuana, Baja California. METHODS: Anthropometric measurements and socioeconomic status were assessed in a cross-sectional study of 1172 school children, aged 6 to 13 years from 55 schools in Tijuana in 2001-2002. Underweight (body mass index [BMI] for age 5th percentile or lower), risk of overweight (BMI at 85th percentile or higher), and overweight (BMI greater than 95th percentile) were assessed using charts published by the Centers for Disease Control and Prevention. RESULTS: Abnormalities in weight were found in 46.3% of 587 boys and 43.7% of 585 girls in the study. Undernutrition was found in 3.7% of the boys and 3.8% of the girls. The general prevalence of overweight was 23.2% for boys and 21.7% for girls. Children living in low-income neighborhoods had the thickest biceps skinfolds (p<0.01), while children living in moderate-income neighborhoods and attending public schools had the thickest triceps skinfolds (p<0.001). Although boys living in high socioeconomic status neighborhoods were at decreased risk for being overweight, boys and girls attending private schools had a 75% increased risk (odds ratio, 1.75; confidence interval, 1.22-2.52) of being overweight than children attending public schools. CONCLUSIONS: Adiposity varies by type of school and neighborhood socioeconomic status. The biphasic curve in risk for being overweight associated with neighborhood socioeconomic status suggests that Mexican children living along the U.S. border may be experiencing a nutrition transition with respect to an increased risk of obesity and related chronic disease.     

Obesity among pre-adolescent and adolescents of a developing country (India)

There are very few reports from the developing world on the prevalence of obesity among children even though in developed countries it has reached epidemic proportions. The objective of this study was to determine the prevalence of obesity in pre-adolescent and adolescent children in a developing country (India) using WHO guidelines for defining obesity and overweight. This cross-sectional study was carried out on 2008 school-children aged 9-15 years. Approximately half the subjects belonged to a school attended by children of well to do families while the rest belonged to two schools from middle and lower socio-economic background. Weight and height were taken for all children and the body mass index (BMI) calculated. Children whose BMI was >85th percentile for age and sex were defined as overweight. Triceps skin fold thickness (TSFT) was measured for all overweight children and those with TSFT >90th percentile for age and sex were defined as obese. The overall prevalence of obesity and overweight was 11.1% and 14.2% respectively. The prevalence of obesity as well as overweight was higher in boys as compared to girls (12.4% vs 9.9%, 15.7% vs 12.9%). Prevalence of obesity decreased significantly with age, from 18.5% at 9 years to 7.6% at 14 years, rising at 15 years to 12.1%. Significantly more children from higher socio-economic status were obese and overweight than those from lower socio-economic status groups. No significant gender difference for obesity prevalence was seen among children from a less privileged background, however, amongst children from affluent families, significantly more boys were obese as compared to girls. Pediatric obesity is an emerging problem in developing countries, especially among higher socio-economic status groups. Significant gender disparity is seen, with boys of affluent background having a higher prevalence.     

2009-2018年上海市6~17岁儿童青少年超重和肥胖的变化趋势

目的 分析2009-2018年上海市6~17岁儿童青少年超重和肥胖的变化趋势,为预防和控制儿童青少年超重肥胖提供依据。方法 采用2009-2018年上海市连续10年的学生常见病监测项目横断面调查数据,选取资料完整的523 112名6~17岁儿童青少年作为研究对象。超重和肥胖判定标准采用2007年世界卫生组织(WHO)制定的儿童青少年生长参照标准(WHO标准)。采用多元线性回归模型分析儿童青少年体重指数变化趋势,Logistic回归模型分析超重和肥胖率的变化趋势。结果 2018年上海市6~17岁儿童青少年超重和肥胖总体检出率分别为19.37%、10.78%,男生分别为22.33%、16.27%,女生分别为16.31%、5.13%,超重和肥胖检出率男生均高于女生(超重:χ²=253.26,P<0.001;肥胖:χ²=1 404.73,P<0.001)。调整年龄、性别后,超重和肥胖率分别由2009年的16.94%、9.22%增加至2018年的19.37%、10.78%(P_趋势<0.001)。结论 2009-2018年上海市6~17岁儿童青少年体重指数、超重和肥胖率均呈增加趋势,增长速度放缓,但仍处于流行状态。     

Childhood Asthma and Extreme Values of Body Mass Index: The Harlem Children’s Zone Asthma Initiative

To examine the association between body mass index (BMI) percentile and asthma in children 2-11 years of age, we performed a cross-sectional analysis of 853 Black and Hispanic children from a community-based sample of 2- to 11-year olds with measured heights and weights screened for asthma by the Harlem Children's Zone Asthma Initiative. Current asthma was defined as parent/guardian-reported diagnosis of asthma and asthma-related symptoms or emergency care in the previous 12 months. Among girls, asthma prevalence increased approximately linearly with increasing body mass index (BMI) percentile, from a low of 12.0% among underweight girls (BMI 95th percentile). After adjusting for age, race/ethnicity, and household smoking, among girls, having asthma was associated with being at risk for overweight (odds ratio [OR], 2.6; 95% confidence interval [CI], 1.4-5.0) and being overweight (OR, 2.1; 95% CI, 1.2-3.8) compared to normal weight; among boys, having asthma was associated both with overweight (OR, 2.4; 95% CI, 1.4-4.3) and with underweight (OR, 2.9; 95% CI, 1.1-7.7). Large, prospective studies that include very young children are needed to further explore the observed association between underweight and asthma among boys. Early interventions that concomitantly address asthma and weight gain are needed among pre-school and school-aged children.     

大连市儿童青少年体重指数分布状况

目的探讨大连市儿童青少年体重指数的分布特征,为预防儿童青少年的超重、肥胖提供相关依据。方法整群抽取大连市区1635名儿童青少年进行身高和体重测量。按照中国肥胖问题工作组（WGOC）推荐的“中国儿童青少年超重、肥胖筛查BMI值分类标准”诊断超重与肥胖。结果大连市儿童青少年体重指数随着年龄的增加而增加,年龄越大BMI值越大;男生不同年龄、女生不同年龄BMI值之间差异有统计学意义;对同一年龄不同性别儿童青少年BMI值进行Z检验,结果表明除7岁、9岁年龄组外,其他年龄段男女生BMI值之间差异均有统计学意义,且男生BMI值均高于女生;不同年龄男生肥胖率变化趋势无明显的规律性,女生肥胖率在9岁后逐年下降,而超重率在10岁后却逐年上升。结论应重视儿童青少年超重、肥胖的预防工作。     

中国2～18岁儿童青少年超重和肥胖筛查体重指数界值点的研究

目的 研究中国2～18岁儿童青少年超重、肥胖筛查体重指数(BMI)界值点.方法 在中国0～18岁儿童青少年BMI生长参照值的基础上,根据常用的超重、肥胖筛查界值点选择方法(与成年人界值点接轨法、百分位法或Z分值法),初步分别确定[BMI 24kg/m2 (BMI24)、28 kg/m2(BMI28)]、(P85、P95)和(Z1、Z2)三组界值点,通过对不同界值点进行差值和检出率比较,并与中国肥胖问题工作组(WGOC)和国际肥胖问题工作组(IOTF)的超重、肥胖界值点做对比分析,最后确定适宜界值点.结果 按照不同的超重、肥胖筛查BMI界值点选择方法获得三组界值点,不同界值点之间存在不同程度差异,但在超重合并肥胖检出率上差异相对较小.与WGOC相比,男章超重、肥胖及女童肥胖界值点非常接近,女童在8.5～15.5岁其超重界值点比WGOC标准低0.3～1.0 kg/m2,通过筛查"2004年北京市儿童代谢综合征调查"数据库,女童超重检出率比WGOC标准高约3.4%.结论 采用与成年人界值点接轨法(BMI24、BMI28)获得的中国2～18岁儿童青少年超重、肥胖筛查BMI界值点是适宜的,实现了在使用BMI指标上年龄的连贯性和筛查标准的一致性.     

不同方法评价乌鲁木齐市新市区儿童青少年超重和肥胖及其体成分差异

目的 分析乌鲁木齐市新市区6~15岁儿童青少年体成分的发育规律及其在超重肥胖儿童青少年间的差异;探讨体重指数(BMI)及体脂两种方法评定超重肥胖的不同,对早期发现儿童青少年超重肥胖及制定改善措施提供参考。方法 2019年1月纳入乌鲁木齐市儿童青少年907人;采用儿童青少年体成分分析仪测量体成分、计算BMI-Z分值;超重肥胖评定参考WS/T586-2018。结果 6~15岁儿童青少年除男生体脂率外,男女生各体成分指标随年龄变化均存在线性趋势(P<0.05),BMI-Z评分男生高于女生(P<0.05);男生体脂百分比随年龄增长呈先上升后下降变化,女生在11岁时体脂百分比(BFP)超过男生(P<0.05)。BMI及BFP评价超重率及肥胖率分别为11.5%和9.0%、14.1%和20.5%;其中BMI正常组有7.6%和3.1%的少儿BFP评定为超重和肥胖;在BMI超重组有49.5%的少儿BFP评定为肥胖。各体成分在超重与肥胖组均高于正常组(P<0.05)。结论 儿童青少年体成分随年龄增长而增加且有性别及年龄差异;不同方法评定超重肥胖率略有不同,提示BMI评定肥胖标准易低估体脂胖肥儿童青少年;其超重和肥胖组各体成分均高于正常组。     

西安市城区2009年7~18岁儿童、青少年超重和肥胖流行病学调查

【目的】 了解西安市城区儿童、青少年超重和肥胖的发病情况。 【方法】 随机整群抽取西安市城区7~18岁中小学生13 994人,采用体质指数(body mass index,BMI)诊断超重和肥胖。采用三次样条对西安市7~18岁儿童青少年体重、身高和BMI百分位数进行拟合,将身高,体重P₅₀,及BMI的P₈₅、P₉₅百分位数值与2005年中国全国标准进行比较。 【结果】 西安市城区7~18岁中小学生超重总发病率为10.42%,男生和女生分别为11.85%和8.83%;肥胖总发病率为4.67%,男生和女生分别为4.92%和4.40%。男生身高P₅₀值在10~15岁(除12岁)比全国标准稍低,男女体重和女生身高P₅₀中位数与全国数值基本接近;男生BMI的P₈₅、P₉₅数值与2005年全国水平基本接近;女生P₈₅和P₉₅值在14岁以前与全国水平基本接近,15岁后有所减低。 【结论】 西安市中小学肥胖发病率在17年间增加了一倍,制定预防儿童超重和肥胖的有效措施势在必行。     

张家口市卫华小学7~12岁儿童肥胖与血压及肺活量的相关分析

目的 了解张家口市卫华小学7~12岁儿童肥胖发生情况,分析儿童期肥胖与血压及肺活量的关系。 方法 于2012年9月通过整群抽样的方法,对张家口市卫华小学1 530名儿童进行体重、身高、血压、肺活量等相关指标进行测量。计算体质指数(body mass index,BMI),依据BMI值筛查超重、肥胖儿童,统计分析肥胖与血压水平及肺活量的关系。结果 受检人群总体超重检出率为13.01%,肥胖检出率为14.25%,其中男童、女童超重检出率分别为17.2%和8.31%,男童、女童肥胖检出率分别为14.23%和8.59%,男童超重、肥胖检出率均显著高于女童(P<0.01);超重和肥胖儿童的收缩压和舒张压水平均显著高于体重正常儿童(P<0.01),且超重、肥胖和体重正常儿童高血压检出率分别为10.55%、39.95%和4.85%,差异有统计学意义(P<0.01);当儿童BMI<30时,BMI与肺活量呈正相关,当BMI≥30时,BMI与肺活量呈负相关。 结论张家口市卫华小学儿童超重、肥胖流行趋势显著,男童更为突出;随着肥胖程度的增加,儿童的收缩压和舒张压水平呈现上升趋势,高血压检出率增加;当儿童BMI≥30时,肥胖已影响肺功能。提示儿童超重、肥胖使心、肺功能降低,预防和控制儿童肥胖刻不容缓。     

Associations of behavioural, psychosocial and socioeconomic factors with over- and underweight among German adolescents

OBJECTIVES: The prevalence of overweight and obesity has dramatically increased in western societies. This paper examines behavioural, psychosocial and socioeconomic factors associated with overweight and underweight among adolescents in Germany. METHODS: Data from the German part of the 2001/02 Health Behaviour in School-aged Children (HBSC) survey, composed of 5,650 respondents aged 11 to 17 years were analysed. Body mass index (BMI) was calculated based on self-reported weight and height. The overweight category was defined as BMI within or above the 90th percentile of specific BMI values for gender and age in the German national sample. The underweight category was defined as BMI within or below the 10th percentile of this sample. A multinomial logistic regression model was used to investigate the association between behavioural, psychosocial and socioeconomic factors and BMI categories. RESULTS: 9.5 % of the boys and 5.4 % of the girls were classified as overweight. The prevalence of underweight was 12.6 % among boys and 19.1 % among girls. Several factors were associated with over- and/or underweight in the bivariate analysis, showing different patterns for gender and BMI categories. In the multivariable model only low family affluence, high sedentary behaviour, and being bullied (for girls only) remained positively associated with being overweight. Being underweight was negatively associated with higher age and low parental occupation; it differed also by region. CONCLUSION: Despite several variables being associated with overweight and underweight in bivariate models, only three factors remained associated with overweight in multivariable analysis. Other considered variables did not have independent associations with the outcome, but still could be included in respective causal pathways. Our results suggest that preventive strategies focussing on students of low socio-economic status and the avoidance of sedentary behaviours could help to address issues of overweight and obesity.     

郑州市城区7~15岁儿童青少年中心性肥胖流行现况

目的 了解郑州市城区中小学生超重肥胖和中心性肥胖的流行现况,为城区学生的超重肥胖防控提供参考。方法 采用分层整群抽样方法,于2019年选取郑州市城区小学和初中学校的6 859名7~15岁学生进行问卷调查和体格检查,采用体重指数(BMI)、腰围(WC)和腰围身高比(WHtR)3种指标标准分析中小学生的超重肥胖和中心型肥胖流行现况。用R 4.0.3软件进行t检验、完全随机设计χ²检验、配对χ²检验和加权Kappa一致性检验。结果 以BMI标准筛查郑州市城区中小学生的总体超重和肥胖率分别为14.4%和10.3%,以WC标准和WHtR标准筛查的中心型肥胖率分别为19.4%和14.3%。3种筛查标准对各年龄段男生的肥胖和中心型肥胖检出率均高于女生,差异有统计学意义(P<0.01);10~15岁学生的中心型肥胖检出率均高于7~9岁学生,差异有统计学意义(P< 0.01)。在筛查中小学生中心型肥胖上,WC标准 vs. WHtR标准的Kappa值为0.73,其中7~9岁、10~12岁和13~15岁男生的Kappa值分别为0.84、0.85和0.76,一致性程度较高。结论 郑州市城区7~15岁学生超重肥胖和中心型肥胖状况不容乐观,尤其是男生和小学生应重点关注,应及早开展综合干预进行防控。     

Augmenting BMI and Waist-Height Ratio for Establishing More Efficient Obesity Percentiles among School-going Children

Research Questions:

1. Are all the existing methods for estimating the obesity and overweight in school going children in India equally efficient? 2. How to derive more efficient obesity percentiles to determine obesity and overweight status in school-going children aged 7-12 years old?

Objectives:

1. To investigate and analyze the prevalence rate of obesity and overweight children in India, using the established standards. 2. To compare the efficiency among the tools with the expected levels in the Indian population. 3. To establish and demonstrate the higher efficiency of the proposed percentile chart.

Study Design:

A cross-sectional study using a completely randomized design.

Settings:

Government, private-aided, unaided, and central schools in the Thrissur district of Kerala.

Participants:

A total of 1500 boys and 1500 girls aged 7-12 years old.

Results:

BMI percentiles, waist circumference percentiles, and waist to height ratio are the ruling methodologies in establishing the obese and overweight relations in school-going children. Each one suffers from the disadvantage of not considering either one or more of the obesity contributing factors in human growth dynamics, the major being waist circumference and weight. A new methodology for mitigating this defect through considering BMI and waist circumference simultaneously for establishing still efficient percentiles to arrive at obesity and overweight status is detailed here. Age-wise centiles for obesity and overweight status separately for boys and girls aged 7-12 years old were established. Comparative efficiency of this methodology over BMI had shown that this could mitigate the inability of BMI to consider waist circumference. Also, this had the advantage of considering body weight in obesity analysis, which is the major handicap in waist to height ratio. An analysis using a population of 1500 boys and 1500 girls has yielded 3.6% obese and 6.2% overweight samples, which is well within the accepted range for Indian school-going children.

Conclusion:

The percentiles for school-going children based on age and sex were derived by comparing all other accepted standards used for measurement of obesity and overweight status. Hence, augmenting BMI and waist to height ratio is considered to be the most reliable method for establishing obesity percentiles among school-going children.     

Relationships between body fatness, small-screen sedentary activity and regionality among schoolchildren in Victoria, Australia

Objective:  To examine the difference in body fatness and engagement in small-screen activities across children living in different degrees of regionality, and to examine the relationship between child body fatness and small-screen activities.
Design:  Cross-sectional study design.
Participants:  Grade 5–6 schoolchildren ( n =  393) from central and metropolitan Victoria, and a parent/guardian of each child ( n =  393).
Main outcome measures:  Parents completed a questionnaire on their child's engagement in television (TV) viewing and video game playing (VGP). Children's weight and height were measured by a researcher. Body mass index (BMI) (kg/m²) was calculated and adjusted for age and sex. Regionality (metropolitan, population  >  100 000; regional, 100 000  >  population  <  20 000; and rural, population  <  10 000) and socioeconomic status (socioeconomic indexes for areas: index of disadvantage) were assigned according to school attended.
Results:  BMI did not differ across regionality or sex. Boys engaged in more VGP than girls, and metropolitan children engaged in more VGP than rural and regional children. TV viewing did not differ across sex or regionality. VGP did not predict BMI, and TV viewing did not predict girls' BMI. Three to four per cent of the variance in boys' BMI was predicted by TV viewing.
Conclusions:  Boys and metropolitan children engage in more VGP. Boys', but not girls', BMI is related to TV viewing. Interventions designed to decrease engagement in TV viewing should be targeting boys.     

宁夏汉族中小学生2000—2019年超重与肥胖变化趋势

  目的  了解2000—2019年宁夏7~18岁汉族中小学生超重肥胖变化趋势,为预防控制儿童青少年超重肥胖提供科学依据。  方法  基于2000—2019年5次“全国学生体质与健康调研”中宁夏地区数据,选取7~18岁汉族中小学生体重、身高等数据进行趋势分析。  结果  2019年宁夏7~18岁儿童青少年超重和肥胖检出率分别为13.34%(1 181/8 855),9.19%(814/8 855),男生2000—2019年超重增长率为11.68%,肥胖增长率为10.07%(χ2=27.60,P＜0.01)。女生2000—2019年超重增长率为6.95%,肥胖增长率为5.77%(χ2=33.82,P＜0.01)。城市男生的超重和肥胖总体增长率均最高,为11.38%和10.45%。农村男生的超重和肥胖增长率在2010年之后均高于城市男生(χ2值分别为13.90,17.09,P值均＜0.05),女生肥胖增长率在2014年之后农村均高于城市(χ2值分别为9.94,33.39,P值均＜0.05)。不论是城市还是农村,经济发展片区由好到差时,超重和肥胖检出率由高到低(χ2值分别为35.19,35.35,P值均＜0.01)。  结论  2000—2019年宁夏中小学生超重、肥胖检出率及体质量指数趋于持续性增长趋势,且农村超重和肥胖增长率逐渐超过城市。预防儿童青少年超重肥胖的具体措施应尽快制定,降低因儿童青少年超重肥胖所造成的社会经济负担。     

鄂伦春族聚居区小学生2013—2018年体格发育监测

  目的  了解2013—2018年鄂伦春聚居区鄂伦春自治旗实验小学7~12岁儿童身体体格发育情况,为开展体质与健康工作提供科学依据。  方法  根据《国家学生体质健康标准(2014年修订版)》和2018年由国家卫生和计划生育委员会发布的“学龄儿童青少年超重与肥胖筛查”标准,分析鄂伦春自治旗实验小学7~12岁儿童近6年身高、体重和体质量指数(BMI)均值及增长率。  结果  2013—2018年7~12岁男女童的身高和体重均呈现增长趋势,身高增长值男童分别为1.8,1.7,1.9,2.6,5.7,5.9 cm,女童分别为2.8,4.5,1.9,1.8,3.6,2.9 cm;体重增长值男童分别为2.2,2.5,5.1,6.3,6.4,7.2 kg,女童分别为2.4,3.6,3.1,1.3,4.6,3.0 kg。其中7~8岁女童增长率高于男童,9~12岁男童增长率高于女童。随着年龄增加,7~12岁男女童BMI均值均呈现上升趋势,同年龄男童BMI始终高于女童。其中,2018年7~12岁男童BMI均值均超过超重的临界值。  结论  鄂伦春族7~12岁儿童的身体形态随着年龄增加而增加,但发展趋向于超重肥胖。