Data on the growth of 1063 children and their parents were analysed. Of the variation in height at prepuberty about 20%, and of the final height 30-46%, were explained by the variation in parental heights; the children's own height at the age of 1-0 year increased the proportion explained to half. Two equations were developed for increasing the accuracy of the evaluation of growth. One defines ...

BACKGROUND Despite the huge proportion of the babies in the developing world being born low birthweight, only about half of the newborns are weighed at birth as weighing scales often tend to be either non-available or defective. OBJECTIVE Designing a nomogram for estimation of birthweight from head circumference (HC) and mid-upper arm circumference (MUAC). METHOD Birthweight, HC and MUAC of...

TO THE EDITOR: The review by Grimes (1) of the history of nomograms was informative. However, his criticism of the “epidemic” of nomogram resurgence was fundamentally unsubstantiated. Grimes states that “nomograms provided speed in calculation at the cost of precision” without providing any evidence that the lost precision mattered. Where is the evidence, for example, that calculating likelihoo...

Introduction. The problem that the author solved has its origin in Nomography: 1 how to reduce a nomogram of aligned points to a circular nomogram? In more mathematical terms: what are local diffeomorphisms that send germs of lines to germs of circles? This question was initially posed for 2-dimensional nomograms by G.S. Khovanskii and, solved by A.G. A discipline which was discovered by the Fr...

The purpose of this study was to evaluate the validity of the predicted V02 max from the Astrand-Ryhming nomogram, using the cycle ergometer as the sole exercise mode and following the recommended submaximal test protocol. In addition, two sets of age correction factors were compared for accuracy. Using the Astrand age correction factors, the SEE of the predicted V02 max for the 40 male subject...

BACKGROUND Due to the protracted natural history of the clinical progression of prostate cancer, biochemical recurrence (BCR) is often used to compare treatment modalities. However, BCR definitions and posttreatment prostate-specific antigen kinetics vary considerably among treatments, calling into the question the validity of such comparisons. OBJECTIVE To analyze prostate cancer-specific mo...

Background: To clarify the prognostic values of serum albumin and peripheral lymphocyte count in patients with non-muscle invasive bladder cancer (NMIBC) and establish a nomogram to predict recurrence-free survival (RFS). Methods: The prognostic nutritional index (PNI) was calculated based on optimal cutoff values of 52.57. RFS was assessed using the Kaplan-Meier method and the equivalences of ...

Title: A generic nomogram for multinomial prediction models: theory and guidance for construction Authors: Maarten van Smeden ([email protected]) Joris De Groot ([email protected]) Stavros Nikolakopoulos ([email protected]) Loes Bertens ([email protected]) Karel Moons ([email protected]) Johannes Reitsma ([email protected]) Version: 1 Date:...

Nomograms have been prepared whereby the respiratory exchange ratio may be derived from the concentrations of carbon dioxide and oxygen in expired gas and oxygen consumption from the volume and oxygen concentration of expired gas; they apply only to patients breathing room air. The nomogram for the respiratory exchange ratio has an error of less than 0.01, which is the limit of visual discrimin...