Nutrition in Chinese-Korean Children and Adolescents.

Objective: To study the nutrition habits among Chinese-Korean children and adolescents in Yanbian Autonomous Prefecture, Jilin, China.

Methods: Data were obtained from the Chinese National Survey on Students' Constitution and Health in 1995, 2000, 2005, and 2010 for Chinese-Korean children and adolescents aged 7-18 years. The number of the subjects included was 4789, 4704, 5875, and 5315, respectively.

Genetic and environmental influences on the relationship between ADHD symptoms and internalizing problems: A Chinese twin study.

Several twin studies have investigated the overlap between attention deficit hyperactivity disorder (ADHD) and externalizing problems; however, limited information is known regarding the genetic and environmental contribution to the overlap between ADHD and internalizing problems. This study examined the genetic and environmental influences on the variation in and covariation between ADHD symptoms and internalizing problems by using the Child Behavior Checklist (CBCL). We investigated 1,316 child and adolescent twins, including 780 monozygotic twins and 536 dizygotic twins, aged 6 years to 18 years from the Chinese Child and Adolescent Twin Registry.

Relationship between Migration and HIV Risky Behavior: a Comparative Study of Returning Migrants and Non Migrants Based on Rural Out-of-school Youth in Jilin, China.

Objective: To estimate the relationship between migration and HIV risky behavior when controlling for gender, age, and educational levels and to evaluate the gender differences in migration, HIV knowledge, and HIV risky behaviors among rural youth in China.

Methods: A cross-sectional, anonymous, investigative questionnaire for 1710 unmarried, out-of-school rural youth, aged between 15 and 24 years, was handed out in Gongzhuling county of Jilin province, China.

Results: 58.

Malnutrition prevalence in lasa xizang children and adolescents.

Objective: To assess the prevalence of malnutrition among children and adolescents in Xizang (Tibet).

Methods: We analyzed data from the Chinese National Survey on Students' Constitution and Health for the years 1995, 2000, 2005, and 2010 pertaining to Tibetan children and adolescents in lase (Lhasa), aged 7-18 years old. Numbers of survey subjects for these years were: 2393, 2754, 2397, and 2643, respectively.

Secular changes of stature in rural children and adolescents in China, 1985-2010.

Objective: To analyze and assess secular change in stature in rural children and adolescents in China from 1985 to 2010.

Methods: Data were obtained from the 6 rounds of the Chinese National Survey on Student's Constitution and Health. The subjects enrolled in the study were children and adolescents aged 7-18 years in rural areas of provincial capitals.

Sexual coercion and health-risk behaviors among urban Chinese high school students.

Objective: To determine the association between health-risk behaviors and a history of sexual coercion among urban Chinese high school students.

Design: A cross-sectional study was performed among 109,754 high school students who participated in the 2005 Chinese Youth Risk Behavior Survey. Data were analyzed for 5,215 students who had experienced sexual intercourse (1,483 girls, 3,732 boys).

Longitudinal study on infants' temperament and physical development in Beijing, China.

The objective of this longitudinal study is to explore the relationship between temperament and physical development among infants in Beijing, China. A total of 1117 term, normal and singleton infants were followed regularly for 12 months. Body weight and horizontal length were measured at 42 days and monthly from the third to twelfth month of their lives.

Secular changes on the distribution of body mass index among Chinese children and adolescents, 1985-2010.

Objective: To analyze the change in Body Mass Index (BMI) distribution among Chinese children and adolescents for the development of more effective intervention for childhood obesity.

Methods: Data on the national students' constitution and health survey between 1985 and 2010 was used for this study. Subjects were students aged 7-18 randomly selected from 30 provinces in China.

[Comparative study of sexual behaviors of high school students between urban and rural China].

Objective: To analyze the situation of sexual behavior in urban and rural Chinese high school students, and to make suggestions for providing appropriate sexual education in the future.

Methods: An anonymous questionnaire survey was conducted in 224 770 high school students selected by using multi-stage stratified cluster sampling method in 28 provincial units of China.

Results: Overall, 5.

A longitudinal study on the catch-up growth of preterm and term infants of low, appropriate, and high birth weight.

The purpose of present study was to explore the trajectories of growth of preterm and term infants of low, high, and appropriate birth weight. A total of 2465 infants were recruited from 2005 to 2007. Infants' length and weight were measured at 12 points: birth, 42 days, and monthly from 3 to 12 months.

Secular change in stature of urban Chinese children and adolescents, 1985-2010.

Objective: Research evidence shows a secular trend in Chinese physical growth in recent years. The aim of this study was to analyze and assess changes in stature of children and adolescents during the 25 years from 1985-2010, using national data.

Methods: Data came from successive cycles of the Chinese National Survey on Students' Constitution and Health (CNSSCH).

Empirical changes in the prevalence of overweight and obesity among Chinese students from 1985 to 2010 and corresponding preventive strategies.

Objective: To determine the extent of the obesity epidemic in school-aged Chinese children in 2010 and track the increasing trend in different socioeconomic regions over the preceding 25 years. Strategies for preventing childhood obesity are suggested.

Methods: We used a dataset provided by the Chinese National Survey on Students' Constitution and Health from 1985-2010.

[Analysis of HIV/AIDS related risk behaviors and their impact factors among out-of-school adolescents in outflow areas].

Objective: To analyze HIV/AIDS related risk behaviors among unmarried outside school adolescents and the impact factors in outflow areas, in order to provide basis for related health education.

Methods: Using cluster sampling method, we investigated a vocational training center for all 15- to 24-year-old unmarried outside school youths in one county. The structured questionnaire based on the Theory of Reasoned Action was anonymous, which filled envelopes on the spot.

[Relationship between waist circumference and body mass index and metabolic syndrome related traits among middle school students in Beijing].

Objective: To analyze the relationship between waist circumference (WC) and metabolic syndrome (MS) related traits among middle school students in Beijing and to provide the proof for making WC cut-offs among Chinese children and adolescents.

Methods: In the study, 1 427 students aged 13-18 years were investigated. The indexes included height, weight, WC, blood pressure, total cholesterol, triglycerides, HDL-cholesterol, LDL-cholesterol and fasting blood glucose.

The epidemiology of alcohol consumption and misuse among Chinese college students.

Aims: To understand alcohol-related risk behaviours among Chinese college students.

Methods: As part of the first China National Youth Risk Behaviour Survey, undertaken in 2009, 52,150 students at 119 colleges were randomly sampled. Information was obtained from self-administered questionnaires.

Earlier menarche can be an indicator of more body fat: study of sexual development and waist circumference in Chinese girls.

Objective: This paper aims to study the relationship between body fat and sexual development in Chinese girls with different waist circumference.

Methods: Six thousand one hundred and fifty six girls aged 6-19 were sampled. Their body weight, height, waist circumference, percentage of body fat and secondary sex characteristics were measured.

Regional, socioeconomic and urban-rural disparities in child and adolescent obesity in China: a multilevel analysis.

Aim: To study socio-demographic patterns of obesity in Chinese children and adolescents.

Methods: Data came from the 2005 cycle of the Chinese National Survey on Student's Constitution and Health. In all, 231,326 subjects aged 7-18 years, distributed across 622 schools and 30 provinces, were analysed.

[Study on the characteristics of sexual intercourse debut and its influencing factors among college students in 18 provinces in China].

Objective: To describe the characteristics of sexual debut among college students in China to provide appropriate sex education in that population.

Methods: An anonymous questionnaire survey was conducted among 33 653 college students selected by multi-stage stratified cluster sampling method in 18 provinces and cities of China.

Results: The percentage of students who had initiated sexual intercourse before age 14 was 1.

[Body mass index cut-offs for overweight and obesity in Chinese children and adolescents aged 2 - 18 years].

Objective: To study the body cut-offs of mass index (BMI) for the purpose of screening overweight and obesity for Chinese children and adolescents aged 2 - 18 years.

Methods: Based on the BMI growth reference values for Chinese children aged 0 - 18, using the common methods to establish the BMI cut-offs for screening overweight and obesity. These methods were having the same empirical percentile or Z scores and the BMI value at 18 years consistent with adults.

[Waist circumference reference values for screening cardiovascular risk factors in Chinese children and adolescents aged 7 - 18 years].

Objective: To explore the optimal threshold values of waist circumference (WC) in detecting the risk on cardiovascular (CV) among the Chinese children and adolescents.

Methods: Association of WC and CV risk factors were studied among 65 898 children and adolescents aged 7 - 18 years whose data were pooled from nine studies carried out in China. Receive-operating characteristic analysis (ROC) and logistic regression were employed to derive optimal age- and sex-specific waist circumference references for predicting the CV risk factors.

[Waist circumference distribution of Chinese school-age children and adolescents].

Objective: To study the distribution of waist circumference (WC) in a representative group of Chinese children for establishing the Chinese WC cut-off points.

Methods: Cross-sectional data obtained from 15 mainland provinces and Hong Kong were collected. There were 178 865 children and adolescents, aged 7 - 18 years-old in total.

Waist circumference reference values for screening cardiovascular risk factors in Chinese children and adolescents.

Objectives: To explore the optimal threshold values of waist circumference (WC) for detecting cardiovascular (CV) risk factors among Chinese children and adolescents.

Methods: Association of WC with CV risk factors was studied among 65,898 children aged 7-18 years whose data were pooled from nine previous studies in China. CV risk factors in this study included hypertension (blood pressure above 95 percentile levels), dyslipidemia (with one or more of the following three indexes: TG > or = 1.

Waist circumference distribution of Chinese school-age children and adolescents.

Background: Waist circumference (WC), a proxy measure of central body fat, is a better predictor than overall body fat for cardiovascular risk factors in both adults and children. WC cutoffs have been established in many countries, but the national WC reference has not been developed in China.

Objective: To study the distribution of WC in a representative group of Chinese children for establishing Chinese WC cutoff points.

Sexual intercourse and high-risk sexual behaviours among a national sample of urban adolescents in China.

Background: To describe the characteristics of a population with high-risk sexual behaviours and associations between sexual intercourse, high-risk sexual behaviours and socio-demographic characteristics among Chinese urban adolescents.

Methods: In 2005, 109,754 students in grades 10-12 and 33,653 college students were anonymously surveyed using a Chinese Youth Risk Behaviour Survey. Demographic variables and indicators of forced sex, condom use and unintended pregnancy were analysed with multiple logistic regressions.

[Investigation of HIV/AIDS related knowledge and attitude among 6,487 high school students].

Objective: To investigate HIV/AIDS related knowledge and attitude among high school students in China, and to preliminarily evaluate the effects of the special HIV/AIDS prevention education programme.

Methods: A total of 6487 high school students from 24 high schools of Beijing, Zhengzhou and Tangshan were investigated by using questionnaire, among which, 6487 students completed the questionnaire (96.08%).