OBJECTIVE To explore the optimal threshold values of waist circumference (WC) in detecting the risk on cardiovascular (CV) among the Chinese children and adolescents. METHODS Association of WC and CV risk factors were studied among 65 898 children and adolescents aged 7 - 18 years whose data were pooled from nine studies carried out in China. Receive-operating characteristic analysis (ROC) an...

BACKGROUND Peak expiratory flow ("peak flow") predicts important outcomes in older persons. Nevertheless, its clinical application is uncertain because prior strategies for reporting peak flow may not be valid. We thus determined the frequency distribution of peak flow by the conventional strategy of percent predicted (%predicted) and by an alternative method termed standardized residual (SR) p...

background: poverty and low socioeconomic status are the most important reasons of increasing the global burden of tuberculosis, not only in developing countries but also in developed countries for particular groups. the purpose of this study was to assess the association between socioeconomic factors and the number of tuberculosis patients using quantile regression for count data.   methods: t...

STUDY DESIGN A biomechanical study using human volunteers. OBJECTIVE Motorized shoulder belt tensioning is a new seatbelt technology that is likely to be incorporated into future vehicles. The objective of this study was to characterize the upper torso biomechanics of 3 sizes of adult volunteers (5th percentile female, 50th percentile male, and 95th percentile male) subjected to motorized sho...

BACKGROUND Obesity is associated with hypertension (HT) and high resting heart rate (HR), as well as metabolic disturbances. However, little is known about how strongly these hemodynamic abnormalities are associated with the degree of obesity in adolescents. METHODS AND RESULTS Height, body weight, resting HR, and systolic and diastolic blood pressures were measured in 20,165 male and 19,683 ...

Background: The prevalence of pediatric obesity has increased over the past several decades worldwide and in Korea. Childhood become a serious social problem.Current Concepts: Diagnosis is based on body mass index (BMI) children adolescents aged ≥2 years. Overweight obese are defined as BMI ≥85th percentile to <95th ≥95th percentile, respectively, corresponding sex age. Obesity further class...

A percentile-based bibliometric indicator is an indicator that values publications based on their position within the citation distribution of their field. The most straightforward percentile-based indicator is the proportion of frequently cited publications, for instance the proportion of publications that belong to the top 10% most frequently cited of their field. Recently, more complex perce...

Michael angelasTro, p.e., pToe inTroducTion The objective of this paper is to establish that vehicle speeds and crash rates at modern roundabouts in the United States are related to driver sight distance. This paper investigated the relationship between driver sight distance and passenger vehicle speeds and vehicle crash rates at roundabouts in the United States based on data collected at 26 si...

background: prevalence of obesity in children has been increasing during recent decades all over the world. obesity, particularly central obesity, is associated with metabolic syndrome and cardiovascular diseases. the present study aimed to assess obesity and central obesity in 6-11 year old birjand elementary school children, east of iran. methods: this cross-sectional study was conducted on 1...

Traditional inferential procedures often fail with censored and truncated data, especially when sample sizes are small. In this paper we evaluate the performances of the double and single bootstrap interval estimates by comparing the double percentile (DB-p), double percentile-t (DB-t), single percentile (B-p), and percentile-t (B-t) bootstrap interval estimation methods via a coverage probabil...