Related Experiment Video
Updated: Jan 21, 2026

High Throughput Danio Rerio Energy Expenditure Assay
Published on: January 27, 2016
Estimating resting energy expenditure of patients on dialysis: Development and validation of a predictive equation
Thais de Oliveira Fernandes1, Carla Maria Avesani2, Maria Ayako Kamimura3
1Nutrition Program, Universidade Federal de São Paulo, São Paulo, Brazil; Hospital do Rim-Fundação Oswaldo Ramos, São Paulo, Brazil.
Objectives:
The aims of this study were to develop and validate a resting energy expenditure (REE) predictive equation in a cohort of patients on dialysis and to test the accuracy of two previously developed specific equations to estimate REE of these patients.
Methods:
A database with REE measured by indirect calorimetry (IC) of 189 patients on hemodialysis and peritoneal dialysis was used to develop and validate the new equation. The sample including only patients on hemodialysis (n = 131) was used to test the accuracy of the specific REE dialysis equations by Vilar and Byham-Gray.
Results:
Multiple regression analysis generated two equations: REE (kcal/d) = 957.02 - 8.08 × age + 11.07 × body weight + 136.4 (if men) (R2 = 0.515) (1) REE (kcal/d) = 624.6-4.8 × age + 20.6 × fat-free, ass-fat-free mass-8.65 (if men) (R2 = 0.512) (2) In the validation group, REE by both equations did not differ from the REE measured by IC. No bias was found in the Bland-Altman analysis and the intraclass correlation coefficient and P20 test showed good reliability with measured REE. Vilar's equation overestimated REE; whereas REE generated by Byham-Gray's equation did not differ from measured REE. Proportional and systematic biases were significant for both equations.
Conclusions:
The new equations developed showed good accuracy and can be valuable to estimate energy needs of patients on dialysis. Byham-Gray's and Vilar's equations presented low to moderate performance to estimate REE of the patients on dialysis.
More Related Videos
Related Concept Videos
Application of the Energy Equation
The Nernst Equation
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
Energy Conservation and Bernoulli's Equation
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
The Resting Membrane Potential
Reliability and Validity
Radioactivity and Nuclear Equations
A nuclide of an element has a specific number of protons and...

