Abstract
Introduction. The aims of this study were to validate the new formulas for weight calculation introduced by the advanced life support group (alsg) of the United Kingdom in 2011 and compare their performance to the formula currently used by the European Resuscitation Council (ERC) and other formulas and to check whether performance of formulas for weight calculation is affected by ethnic group and gender. Methods. Prospective audit of weight versus calculated weight comparing alsg formula with ERC, Luscombe, Argall, and Best Guess formulas analysed for gender, age, and ethnic groups. Results. Prospectively 599 children were included: 157 Asian, 268 Caucasian, and 174 children from other origin. In infants there was no difference between actual weight and alsg formula calculated weight. There was a progressively increased underestimation of weight year by year from 1 to 10 years of age using the ERC formula. In the 6–10 year age group the ERC formula underestimated the weight by a mean of 6.5 kg (21.8%, P < 0.001) with the alsg and Luscombe formulas performing best. In 11-12 year old children the alsg formula estimated well. Conclusion. In one- to ten-year-old children, the Luscombe formula provided a better weight estimate than alsg and ERC formulas in a multiethnic population.
Highlights
The aims of this study were to validate the new formulas for weight calculation introduced by the advanced life support group of the United Kingdom in 2011 and compare their performance to the formula currently used by the European Resuscitation Council (ERC) and other formulas and to check whether performance of formulas for weight calculation is affected by ethnic group and gender
In infants (n = 184) the APLS 2011 and Best Guess formulas didn’t calculate a significantly different weight from the actual weight with a mean weight difference of 0.27 kg for the APLS 2011 and overestimation of −0.23 kg (95% −0.62 to 0.14, P = 0.2) for the Best Guess formula
In the age group 1 to 5 years old there was a significant difference between weight calculated by ERC and APLS 2011 formulas, Argall and Best Guess formulas, and actual weight with children’s weight being underestimated by a mean of 1.3 kg (95% CI 0.75 to 1.9, Weight difference (%)
Summary
The aims of this study were to validate the new formulas for weight calculation introduced by the advanced life support group (alsg) of the United Kingdom in 2011 and compare their performance to the formula currently used by the European Resuscitation Council (ERC) and other formulas and to check whether performance of formulas for weight calculation is affected by ethnic group and gender. Prospective audit of weight versus calculated weight comparing alsg formula with ERC, Luscombe, Argall, and Best Guess formulas analysed for gender, age, and ethnic groups. In the 6–10 year age group the ERC formula underestimated the weight by a mean of 6.5 kg (21.8%, P < 0.001) with the alsg and Luscombe formulas performing best. In one- to ten-year-old children, the Luscombe formula provided a better weight estimate than alsg and ERC formulas in a multiethnic population. In an Asian population in Karnataka, India, the formula used by the European Resuscitation Council (ERC formula, former APLS formula) overestimated the weight by at least 2-3 kg in children one to twelve years of age [4]. In 2011 the advanced life support group of the United Kingdom published new formulas for calculation of weight from age [6]
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