BACKGROUND While healthy lifestyle habits are generally assumed to be important for high academic achievement, there has been little research on this topic among adolescents. The aim of this study was therefore to examine the associations between several lifestyle habits and academic achievement in adolescent girls and boys. METHODS The study included 2,432 Norwegian adolescents, 15-17 years ...

BACKGROUND The proportion of elderly people in the population is growing, and Korea has one of the fastest growing populations among the world's major regions. The objective of this study was to examine the effects of physical activity on the health and quality of life of elderly Korean people. METHODS A nationally representative sample of 2,853 elderly Korean people (1,239 males and 1,614 fe...

Abstract Background COVID-19 limitation strategies led to widespread school closures around the world. The present study aims provide a description of children's mental health and associated factors during closure in France. Methods We conducted cross-sectional analysis SAPRIS pandemic France, relying on 2 ongoing national birth cohorts, ELFE EPIPAGE 2. Using weighted multinomial logistic regre...

Consider the linear system Ax=b where the coefficient matrix A is an M-matrix. In the present work, it is proved that the rate of convergence of the Gauss-Seidel method is faster than the mixed-type splitting and AOR (SOR) iterative methods for solving M-matrix linear systems. Furthermore, we improve the rate of convergence of the mixed-type splitting iterative method by applying a preconditio...

OBJECTIVES To compare individual with community risk factors for adolescent smoking. DESIGN A cross-sectional observational study with multivariate analysis. SETTING National telephone survey. PARTICIPANTS 3646 US adolescents aged 13-18 years in 2007 recruited through a random digit-dial survey. OUTCOME MEASURES Ever tried smoking and, among experimental smokers, smoking intensity (base...

Tapeworms of Gangesia Woodland, 1924 (Cestoda: Proteocephalidea) parasitic in freshwater fishes in the Indomalayan Region were critically reviewed. Evaluation of type specimens and newly collected materials from Bangladesh, Cambodia and India, as well as critical examination of extensive literature have shown that only the following four species, instead of 48 nominal species of Gangesia and Si...

BACKGROUND Girl education is believed to be the best means of reducing girl child marriage (marriage <18 years) globally. However, in South Asia, where the majority of girl child marriages occur, substantial improvements in girl education have not corresponded to equivalent reductions in child marriage. This study examines the levels of education associated with female age at marriage over the ...

BACKGROUND Non-fatal overdose is a major determinant of morbidity among injection drug users (IDU). We sought to evaluate factors associated with non-fatal overdose among IDU in Vancouver. METHODS We examined non-fatal overdose among participants in the Vancouver Injection Drug Users Study. Correlates of non-fatal overdose occurring between 1996 and 2004 were identified using generalized esti...

consider the linear system ax=b where the coefficient matrix a is an m-matrix. in the present work, it is proved that the rate of convergence of the gauss-seidel method is faster than the mixed-type splitting and aor (sor) iterative methods for solving m-matrix linear systems. furthermore, we improve the rate of convergence of the mixed-type splitting iterative method by applying a precondition...

consider the linear system ax=b where the coefficient matrix a is an m-matrix. in the present work, it is proved that the rate of convergence of the gauss-seidel method is faster than the mixed-type splitting and aor (sor) iterative methods for solving m-matrix linear systems. furthermore, we improve the rate of convergence of the mixed-type splitting iterative method by applying a precondition...