It is time to abandon age-based emergency weight estimation in children! A failed validation of 20 different age-based formulas

Resuscitation
Mike WellsAllison Bentley

Abstract

When children's weight cannot be measured during medical emergencies, it must be estimated, as weight is required for many interventions. Age-based formulas are the oldest weight estimation systems in children, but have been shown to be very inaccurate in many studies. This aim of this study was to evaluate the accuracy of age- and length-based formulas and to see if a measure of body habitus could be used to improve the performance of these formulas. This was an analysis of data from a sample of 1085 children aged from 1 month to 16 years, collected from four Emergency Departments in Johannesburg, South Africa. Basic demographic and anthropometric data was collected and each child had a visual assessment of body habitus, quantified as a habitus score. Weight estimates from 20 existing age-based formulas and two length-based formulas were then compared against measured weight to determine their accuracy. Age- and length-based, habitus-modified models were developed and similarly evaluated.

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Citations

Sep 25, 2017·International Journal of Emergency Medicine·Mike WellsAlison Bentley
Dec 20, 2019·Emergency Medicine Australasia : EMA·Daming PanAnne-Maree Kelly
Apr 19, 2018·Journal of Tropical Pediatrics·Clarence Mvalo MbangaTsi Njim
Jan 22, 2020·Nutrición hospitalaria·Catarina Tenorio de CerqueiraJosé Natal Figueiroa
May 31, 2019·Emergency Medicine Australasia : EMA·Mieke FosterAnne-Maree Kelly
Feb 14, 2020·International Journal of Emergency Medicine·Pukar K CAnmol Purna Shrestha
Sep 6, 2018·World Journal of Emergency Medicine·Karun ShresthaDarlene R House
Mar 4, 2020·Enfermería clínica·Sendoa Ballesteros-PeñaUNKNOWN Investigadores colaboradores del Grupo de trabajo WEST
Nov 5, 2020·Journal of the American College of Emergency Physicians Open·Mike Wells, Lara Goldstein
Nov 22, 2017·Resuscitation·Nicholas AppelbaumAra Darzi
Apr 17, 2021·African Journal of Emergency Medicine : Revue Africaine De La Médecine D'urgence·Rafiuk Cosmos YakubuNedda Ayi-Bisah

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