Cross-sectional study on influence of the family environment on the lifetime non-medical use of prescription drugs among Chinese adolescents in Guangdong: an analysis of sex differences.

Objectives: This study aimed to assess if adolescents had used any prescription drugs non-medically, to explore the associations between the family environment and non-medical use of prescription drugs (NMUPD) and to investigate whether there are any sex differences in the aforementioned associations.

Design: A population-based cross-sectional study.

Setting: A secondary analysis of the cross-sectional data collected from high school students in Guangdong who were sampled using a multistage, stratified-cluster, random-sampling method in the 2015 School-based Chinese Adolescents Health Survey.

Bullying as a risk for poor sleep quality among high school students in China.

Objective: To determine whether involvement in bullying as a bully, victim, or bully-victim was associated with a higher risk of poor sleep quality among high school students in China.

Methods: A cross-sectional study was conducted. A total of 23,877 high school students were surveyed in six cities in Guangdong Province.

Nasopharyngeal carcinoma patients with retropharyngeal lymph node metastases: a minimum axial diameter of 6 mm is a more accurate prognostic predictor than 5 mm.

Objective: The criteria for the diagnosis of metastatic retropharyngeal lymph nodes (RLNs) have not yet been resolved and are not included in the current edition of the American Joint Committee on Cancer (AJCC) staging system (seventh edition) for the staging of nasopharyngeal carcinoma (NPC). The aim of this study was to use MRI to identify an RLN size criterion that can accurately predict prognosis in patients with NPC.

Materials And Methods: Eight hundred seventeen patients with newly diagnosed localized NPC were identified.

Manumycin induces apoptosis in prostate cancer cells.

Background: Manumycin exhibits an antitumor effect in a variety of cancer cell lines, including prostate cancer cell lines (DU145 and PC-3). Our previous studies demonstrated that manumycin induced the apoptosis of anaplastic thyroid cancer cells and leukemia cells via the intrinsic apoptosis pathway. In the current study, we further evaluated the effect of manumycin in two prostate cancer cell lines (LNCaP and 22Rv1), and here we elucidate some of the underlying mechanisms.

Promoting contraceptive use among female rural-to-urban migrants in Qingdao, China: a comparative impact study of worksite-based interventions.

Background: We conducted a comparative study in worksites to assess the impact of sexual health promoting interventions on contraceptive use among female rural-to-urban migrants.

Study Design: In Qingdao ten manufacturing worksites were randomly allocated to a standard package of interventions (SPI) and an intensive package of interventions (IPI). The interventions ran from July 2008 to January 2009.

[Distributions of primary nasopharyngeal carcinoma tumor and patterns of skull base erosion detected by magnetic resonance imaging].

Objective: To evaluate the distributions of primary nasopharyngeal carcinoma (NPC) and the patterns of skull base involvement in NPC patients using magnetic resonance imaging (MRI).

Methods: After the approval of institutional review board and informed consent, 838 consecutive newly-diagnosed and untreated NPC patients were examined by MRI. Their MR images were reviewed by two independent radiologists.

Determinants of unmet need for contraception among Chinese migrants: a worksite-based survey.

Background: Considerable sexual and reproductive health (SRH) challenges have been reported among rural-to-urban migrants in China. Predictors thereof are urgently needed to develop targeted interventions.

Study Design: A cross-sectional study assessed determinants of unmet need for contraception using semi-structured interviews in two cities in China: Guangzhou and Qingdao.

Behavioural development of school-aged children who live around a multi-metal sulphide mine in Guangdong province, China: a cross-sectional study.

Background: The deleterious biological effects of low-level, long-term exposure to heavy metals are well known, and children are the most susceptible population. Dabaoshan Mine in the southeast of Guangdong Province is at high risk of discharging multi-metals pollutants into a local river (Hengshihe) and the surrounding area. The present study aimed to estimate relationships between measured multi-metal exposures and the presence of behavioural problems for the school-aged children in the polluted area.

Which preventive measures might protect health care workers from SARS?

Background: Despite the use of a series of preventive measures, a high incidence of severe acute respiratory syndrome (SARS) was observed among health care workers (HCWs) during the SARS epidemic. This study aimed to determine which preventive measures may have been effective in protecting HCWs from infection, and which were not effective.

Methods: A retrospective study was performed among 758 'frontline' health care workers who cared for SARS patients at the Second Affiliated Hospital and the Third Affiliated Hospital of Sun Yat-sen University.

Potential infections of H5N1 and H9N2 avian influenza do exist in Guangdong populations of China.

Background: Southeast China is one of the sites of influenza origin. During 2003--2004, nine avian influenza outbreaks took place in Guangdong Province. But no human case was reported.

[Relationship between apoptosis and activity of protein kinase B in adrenocortical cells induced by cadmium chloride].

Objective: To study apoptosis induced by cadmium chloride (CdCl2) and the alteration in activity of protein kinase B (PKB/Akt) in adrenocortical cells.

Methods: Fasciculata-glomerulosa (FG) cells of male guinea pigs were dispersed and primarily cultured in vitro. Features of apoptotic cells were observed using combined labeling with annexin-V and propidium iodide (PI) and flow cytometry.

[Study on the impact of related psychological stress and fatigue to different smoking behaviors among undergraduate students].

Objective: To explore the relationship between psychological stress, fatigue and different smoking behaviors among undergraduate students.

Methods: 8138 undergraduate students in grade 1 to 3 were sampled with cluster sampling method from a comprehensive university in Guangzhou, and were studied on their psychological stress, peer and self smoking behaviors, as well as socio-demographic factors with a self-administered questionnaire. Physical and mental fatigue was measured by Chalder fatigue scale.

Treatment outcome of new pulmonary tuberculosis in Guangzhou, China 1993-2002: a register-based cohort study.

Background: Completion of treatment for tuberculosis (TB) is of utmost priority for TB control programs. The aims of this study were to evaluate the treatment outcome of TB cases registered in Guangzhou during the period 1993-2002, and to identify factors associated with treatment success.

Methods: Two (of eight) districts in Guangzhou were selected randomly as objects of study and their surveillance database was analyzed to assess the treatment outcome and identify factors associated with treatment success for TB cases registered in Guangzhou.

[Process evaluation on a health promotion model regarding smoking prevention among Chinese secondary school students].

Objective: To evaluate the process of smoking prevention and control among Chinese adolescent with a model on health promotion in junior high school.

Methods: A cluster-randomized, controlled and schooled-based trial on smoking prevention was conducted among 2343 students at four secondary schools in Huangpu District of Guangzhou. Students 'reports and investigators' daily records were used to evaluate the intervention measures.

[Determinants of attempt and success in smoking cessation among male secondary school students].

Objective: To investigate the prevalence of smoking cessation in schoolboys and the possibility of success, and examine the predictors of quitting attempt and success.

Methods: In a cross-sectional survey, self-administered questionnaires were answered by 4658 schoolboys to collect the information including their demographic characteristics, school conditions, smoking and health related knowledge and attitudes, and smoking related behaviors.

Results: Of the respondents, 7.

[Analysis on factors influencing the smoking behaviors among male secondary school students under the structural equation model].

Objective: To analyze the direct and indirect outcomes of influencing factors on smoking behaviors among adolescents.

Methods: Self-administered questionnaires were used to collect smoking-related information from 2021 respondents. Measurement models were built by confirmatory factor analysis and parameters were estimated by ERLS method.

[Study on the related factors of smoking behavior transition at different stages among undergraduate students].

Objective: To explore the influencing factors of smoking behavior transition at different stage of smoking among undergraduate students.

Methods: 8138 undergraduate students from grade 1 to 3 were selected using cluster sampling method from an university in Guangzhou with their smoking behaviors and relevant factors studied through a self-administered questionnaire. Beginners, un-regular smokers and regular smokers were defined as "case group", while non-smokers, beginners and un-regular smokers were defined as "control group" accordingly.