OBJECTIVES The aim of this study is to find the association between mothers' working hours and obesity of their children according to children's age and gender. METHODS This study used data from the second and third year of KNHANES IV and the first year in KNHANES V (2008-2010). We calculate odds ratio (OR) and 95% confidence interval (CI) by using survey logistic regression to assess associa...

OBJECTIVE To estimate the genetic and environmental contributions to oppositional defiant behavior (ODB) from mother, father, and teacher report using the Conners Revised Short Forms in a large twin sample. METHOD ODB data were collected from 1,595 mothers, 1,114 fathers, and 793 teachers of 7-year-old twin pairs from the Netherlands Twin Registry in the 1990-1992 cohort with an 80% response ...

The pubertal voice in musically trained (voice conscious) boys and girls was investigated with voice range profiles and fundamental frequency (F0) in running speech during reading of a standard text. The methods were based on: 1) development and evaluation of the function of phonetograph 8301 made by the firm Voice Profile, 2) combined electroglottographic and stroboscopic examination of the mo...

BACKGROUND Promoting daily routine activities, such as active commuting to school, may have important health implications for young people. PURPOSE The aim of the study was to examine the secular trend of active commuting to school in Spanish adolescents over a 6-year period (2001-2002 to 2006-2007). We also examined several factors that might explain this trend. METHODS Data comes from two...

OBJECTIVE Clinicians should show an awareness on the menstrual characteristics of adolescent girls which may differ from adults in some aspects. To define menstrual cycle features among high school girls residing in a city center in southeastern Turkey. METHODS A cross-sectional survey was conducted on 1256 girls attending a high school located in the city center of Elazığ, Turkey. Data from ...

Results Questionnaires were completed by 234 (93.6%) of 250 children who were approached. The mean age of the children was 14.3 (range 13-15 years). 70 (29%) were girls and 141 (60%) were boys; 23 (9.8%) did not fill in the personal details. 12 girls had driven a car or bike, of which 6 always, 4 sometimes and 2 never had driven without a helmet/seat-belt. 66 boys had driven a car or bike of wh...

Gender segregation in the labor market may be explained by women’s reluctance to choose technical occupations, although the foundations for career choices are certainly laid earlier, during education. Educational experts claim that female students are doing better in math and science and are more likely to choose those subjects if they are in single-sex classes. Possible explanations are the la...

Ethnicity and religion are known to be important factors associated with substance use and misuse (SUM). Ethnic Bosniaks, Muslims by religion, are the third largest ethnic group in the territory of the former Yugoslavia, but no study has examined SUM patterns among them. The aim of this study was to explore the prevalence of SUM and to examine scholastic-, familial- and sport-factors associated...

Material and methods An analysis of pre-operational 82 CT in children with the pectus excavatum deformity was made. Patients were divided into two groups depending on the chest deformation ; the first one consisted of patients with symmetric pectus excavatum, there were 48 patients (9 girls, 39 boys), the mean age was 12,8 years (4-16), the average Haller index was 3,6 (2,2-7,1); in the second ...