background: several environmental and psychosocial risk factors are known for adolescent smoking as the single cause of preventable diseases and premature death. this cross-sectional study aimed to determine the prevalence of cigarette smoking, socio-demographic factors associated with cigarette smoking (age, education level, parents’ job, and family’s socioeconomic statues), and the role of fa...

introducation: emotion regulation and thought-action fusion (taf) are among the most important components which cause psychological disorders. the present study aimed to predict somatoform disorder regarding the emotion regulation and taf in female students of the savadkuh county. methods:   in this descriptive correlation study, 110 middle school female students in the city of savadkuh in the ...

BACKGROUND National and international child health surveys have indicated an increase in childhood obesity in China. The increase has been attributed to a rising standard of living, increasing availability of unhealthy foods, and a lack of knowledge about healthy diet. The objective of this study was to assess the effect of selected socio-demographic characteristics on the BMI, nutrition knowle...

A multi-stage cluster sampling is proposed for quantifying and monitoring plant species richness at multiple spatial grains over large spatial extents. An unbiased estimator of average species richness at different grains and a conservative estimator of its sampling variance are obtained in a complete design-based framework, i.e., avoiding any assumption about the ecological community under stu...

OBJECTIVE To describe the prevalence of Herpes Simplex Virus-2 (HSV-2) infection among males in six major cities of Pakistan. METHODS A cross sectional behavioural and biological survey of urban male population aged 16-45 years was conducted in Rawalpindi, Lahore, Karachi, Faisalabad, Peshawar and Quetta to measure the prevalence of five sexually transmitted infections and assess sexual behav...

Background: The sexual health indices of the adolescents are very poor. This study ascertained the factors influencing the sexual behaviour among female adolescents in Onitsha, Anambra state, Nigeria. Method: This was a cross sectional design in which a total of 800 female adolescents were selected from secondary schools in the area using multistage sampling method; and also selected from a maj...

BACKGROUND Measuring vaccination coverage permits evaluation and appropriate targeting of vaccination services. The cluster survey methodology developed by the World Health Organization, known as the 'Expanded Program on Immunization (EPI) methodology', has been used worldwide to assess vaccination coverage; however, the manner in which households are selected has been criticized by survey stat...

objective: the present research was conducted to study the effect of play therapy on reducing behavioral problems of children with oppositional defiant disorder. method: using multistage cluster sampling, regions 6, 7, and 8 in tehran were selected. among kindergartens of these areas, 3 kindergartens which were supported by the welfare organization were randomly selected. of all the pre-school ...

background: to determine the sensitivity, specificity, positive predictive value (ppv), and negative predictive value (npv) of the national vision screening program for 7 yr old children in iran. methods: in this cross-sectional study, eight cities in iran were selected through multistage cluster sampling. selected cities were sari, birjand, ardabil, mashhad, bandar abbas, dezful, yazd, and ara...