Adolescent Screen Use: Problematic Internet Use and the Impact of Gender.

Objective: The relationship between screen use and problematic internet use (PIU; i.e., internet addiction) amongst adolescents has not been sufficiently explored.

Association of Ang-(1-7) and des-ArgBK as new biomarkers of obesity and cardiometabolic risk factors in adolescents.

Children with obesity have a high risk of developing cardiovascular disease and hypertension, which is associated with the renin-angiotensin system (RAS) activation and kallikrein-kinin system (KKS) inactivation. Although recent studies have identified several peptide-based biomarkers for obesity, circulating peptides from the RAS and KKS in adolescents with obesity have not been described. The aim of this study was to examine circulating levels of RAS and KKS peptides in adolescents with obesity to investigate the turnover of these peptides and their relationship to metabolic disorders resulting from weight gain.

Prevalence of signs and symptoms of temporomandibular dysfunction in female adolescent athletes and non-athletes.

Objectives: To compare the prevalence of signs and symptoms of temporomandibular dysfunction (TMD) in female adolescent athletes and non-athletes and to examine the association between signs and symptoms of TMD in female adolescents in different Tanner stages.

Methods: The subjects were 89 female basketball and handball players ages 10-18 years and 72 female non-athlete adolescents ages 10-19 years selected from the Department of Pediatrics (School of Medicine, Federal University of São Paulo) as a control group. A survey was used to assess the signs and symptoms of TMD.

Adolescents with chronic migraine commonly exhibit depressive symptoms.

Psychiatric comorbidity in patients with headache contributes to poorer prognosis, chronification of disease, poor response to treatment, increased cost of treatment, and decreased quality of life. The purpose of the present study was to evaluate the depressive symptoms in adolescents with chronic and episodic migraines and healthy adolescents. The study was performed between November 2010 and November 2011.

Nocturnal enuresis antecedent is common in adolescents with migraine.

Background: Migraine and nocturnal enuresis are highly prevalent disorders with striking similarities. Both have unknown pathophysiology and are considered multifactorial, with neurobiological, genetic, and behavioral aspects involved. Interestingly, the same neurological structures thought to be involved in the pathogenesis of migraine are also thought to be involved in nocturnal enuresis.

Effect of calcium intake, tennis playing, and body composition on bone-mineral density of Brazilian male adolescents.

In this prospective, cross-sectional study male adolescent tennis players (44) and nonathletic controls (32) were evaluated to determine the effects of physical activity, dietary nutrient intakes, sexual maturation, and body composition on bone-mineral density (BMD). Dietary nutrient intakes and physical activity expenditure were estimated by 4-d diaries. Total body composition, bone-mineral content (BMC), and BMD (L1-L4, femur, and nondominant forearm) were assessed by dual-energy X-ray absorptiometry.