Environmental tobacco smoke exposure and Chinese schoolchildren's respiratory health: a prospective cohort study.

Background: Although China is the most coveted cigarette market worldwide, few studies have examined the longitudinal effects of environmental tobacco smoke (ETS) on health.

Purpose: To examine the relationship between exposure to ETS and respiratory health in Chinese schoolchildren.

Methods: The study subjects included 1718 children, who were never-smokers, aged 10.

Physical activity, cardiorespiratory fitness, and obesity among Chinese children.

Objective: To investigate the relationships of cardiorespiratory fitness (CRF) and physical activity (PA) with the risk of overweight/obesity in Chinese schoolchildren.

Methods: A total of 1795 children aged 8-13 years at baseline were followed-up for 18 months from 2006 to 2008 in Guangzhou, China. Children were categorized as "normal weight", "overweight", and "obese" using Chinese obesity cut-off points.

Effects of ambient air pollution on lung function growth in Chinese schoolchildren.

Objective: To evaluate the adverse effect of exposure to air pollution on lung function growth in school-aged children.

Methods: A cohort of 1983 children from three districts in Guangzhou, China was followed-up for 6 months. The children performed pulmonary function tests twice, and their parents reported the child's respiratory symptoms by self-administered questionnaires in both surveys.

[A matched case-control study on risk factors related to sports injuries in primary and secondary school students in Guangzhou].

Objective: To investigate the risk factors and to provide evidence for prevention and reduction of sports injuries in primary and secondary school students in Guangzhou.

Methods: 1:1 case-control study was conducted on both 349 cases and controls under the same distribution of sex, age and grade. Conditional univariate and multivariate logistic regression were used to explore the relationships between risk factors and injuries.

[Time domain terahertz spectroscopy of (Pb,La)TiO3 ferroelectric thin films].

Terahertz time-domain spectroscopic technique was applied to investigate the spectral properties of (Pb, La)TiO3 (PLT) ferroelectric thin films prepared on SiO2/Si substrates. The terahertz spectra of three kinds of PLT thin films with different sintering temperatures were observed. According to the experimental data, the absorption coefficients, refraction indexes and dielecric constants of the PLT thin films were computed, and the experimental results of the three kinds of PLT thin films with different sintering temperatures in the effective frequency range were compared.

Respiratory health in overweight and obese Chinese children.

Objectives: Childhood obesity has been suggested to be associated with asthma and impairment of pulmonary functions, but the findings are conflicting. The aim of this study was to examine the relationship of body mass index (BMI) with asthma, asthma-like symptoms, and lung functions in Chinese schoolchildren.

Methods: Data from a survey of 2,179 children aged 10.

[Lead levels in children after 10-year use of unleaded gasoline in Guangzhou municipality].

Objective: To investigate the blood lead levels (BLLs) in children after 10-year use of unleaded gasoline in Guangzhou and evaluate the effect of this measure.

Methods: Through stratified random sampling method, 4 kindergartens and 4 elementary schools were selected from each of three districts among 12 districts of Guangzhou. Totally 2373 children were recruited into this survey and 1-2 ml blood was sampled from each child through vein.