BACKGROUND Risk factors for osteosarcoma in young people were investigated in a population-based case-control study among residents of New York State, excluding New York City. METHODS Cases (n = 130) were diagnosed between 1978 and 1988 at < or = 24 years of age. Controls were randomly selected from birth certificates and were pair matched to cases on year of birth and sex. Exposure informati...

the present study aims at investigating psychometric properties of tracy&apos;s personal globe inventory (pgi). for this purpose, 633 male and female teachers from shahrekord elementary, middle and high schools were selected through stratified random sampling. the research instrument was occupation, abilities and occupational interests forms of tracy&apos;s personal globe inventory. data analys...

BACKGROUND School health education can effectively help reduce the prevalence of health-risk behaviors among students and have a positive influence on students' academic performance. This article describes the characteristics of school health education policies and programs in the United States at the state, district, school, and classroom levels. METHODS The Centers for Disease Control and P...

PROBLEM/CONDITION School health education (e.g., classroom instruction) is an essential component of school health programs; such education promotes the health of youth and improves overall public health. REPORTING PERIOD February-May 1998. DESCRIPTION OF SYSTEM The School Health Education Profiles monitor characteristics of health education in middle or junior high schools and senior high ...

PURPOSE To quantify the number of required hours of nutrition education at U.S. medical schools and the types of courses in which the instruction was offered, and to compare these results with results from previous surveys. METHOD The authors distributed to all 127 accredited U.S. medical schools (that were matriculating students at the time of this study) a two-page online survey devised by ...

The security guarantees provided by SSL/TLS depend on the correct authentication of servers through certificates signed by a trusted authority. However, as recent incidents have demonstrated, trust in these authorities is not well placed. Increasingly, certificate authorities (by coercion or compromise) have been creating forged certificates for a range of adversaries, allowing seemingly secure...

Data from linked birth and death certificates from the State of Oregon were used to determine the monthly distribution of deaths from sudden infant death syndrome (SIDS) for the years 1976 through 1984. The monthly number of SIDS deaths increased in winter and decreased in summer, when schools usually are not in session. Absences from kindergarten were determined from school records for the per...

Throughout the twentieth century, many efforts have been made to find a grade organization for American schools better than the eight-grade elementary and four-grade secondary pattern of education that had become common by the latter part of the twentieth century. Now as we face the twentyfirst century, a three-level, elementary-middle-secondary organization has become the prevailing plan, but ...

BACKGROUND This article describes policies, practices, and facilities that form the physical activity climate in Minneapolis/St. Paul, Minnesota metro area middle and high schools and examines how the physical activity climate varies by school characteristics, including public/private, school location and grade level. METHODS Surveys examining school physical activity practices, policies and ...