We propose the percentile curves concept as conditional probabilities curves across representative percentiles of the distribution of curves induced by random effects in a logistic model with random intercepts. We extend this concept to a logistic model with random intercepts and slopes and propose a methodology to approximate the percentile curves using the Monte-Carlo technique. We apply this...

Elevated nutrients and sediments are the main factors contributing to the poor biological condition measured in over 40% of US waters, highlighting the need for criteria that can aid management efforts to protect or restore the quality of US waters. A large amount of literature on nutrient criteria has been generated since the USEPA called for their development in 1998. Our objective was to exa...

background: childhood obesity could induce some risk factors for cardiovascular disease (cvd) including serum lipid abnormalities, hypertension, and atherosclerosis. the present study aimed to comparison the lipid profile in normal children with cases having overweight, obesity and central obesity . methods : i n this case control study , which was conducted 2013 , serum lipids for three groups...

PURPOSE The purposes of this study were to determine if young children with rampant dental caries that received complete dental rehabilitation under general anesthesia: 1.) weighed less preoperatively compared to national norms; and 2.) demonstrated significant improvement postoperatively in percentile weight gain and/or quality of life indicators. METHODS The preoperative and postoperative p...

An audio version of this article is available at NEJM.org A 13-year-old boy visits his pediatrician because his school football team requires medical clearance before the start of the season. On physical examination, his weight is 72 kg (above the 99th percentile for age and sex) and his height is 155 cm (the 50th percentile); his body-mass index (the weight in kilograms divided by the square o...

An echocardiographic evaluation of 77 members of a championship childhood swim team showed dimensional variations from normal in most athletes. Cardiac walls were thicker than the 95th percentile of normal: right ventricular anterior wall exceeded the 95th percentile in 100%, interventricular septum in 83% and left ventricular posterior wall in 91%. The left ventricular and left atrial cavities...