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Original Article
Development and validation of a weight estimation tool for paediatric emergency care
Desarrollo y validación de una fórmula de estimación del peso para emergencias pediátricas
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Sendoa Ballesteros-Peñaa,b,c,
Corresponding author
sendoa.ballesteros@ehu.eus

Corresponding author.
, Irrintzi Fernández-Aedob,c, Gorka Vallejo-De la Hozb,c,d, Garbiñe Pérez-Llarenae, Irantzu Echeandia-Lastraa, on behalf of the WEST working group
a Organización Sanitaria Integrada Bilbao-Basurto, Bilbao, Bizkaia, Spain
b Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
c Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Leioa, Bizkaia, Spain
d Organización Sanitaria Integrada Barrualde-Galdakao, Galdako, Bizkaia, Spain
e Organización Sanitaria Integrada Ezkerraldea-Enkarterri-Cruces, Barakaldo, Bizkaia, Spain
This item has received
Received 19 January 2019. Accepted 08 December 2019
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Figures (2)
Tables (3)
Table 1. Equations resulting from linear regression models and simplified formulas derived for weight estimation.
Table 2. Sample characteristics.
Table 3. percent errors committed in weight estimation using the “Bilbao formulas” with respect to real weight.
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Abstract
Objective

To develop and validate a weight estimation tool applicable in paediatric emergency care.

Methods

Using anthropometric data from a computerized database of the primary health care paediatric services, Bilbao (Basque Country, Spain), linear regression models were developed with the objective of estimating weight from height. Subsequently, these models were prospectively validated using a consecutive sample of children attended in the emergency department of two tertiary hospitals. Estimated weights were compared with actual weights, calculating the intraclass correlation coefficient (ICC), mean difference and percentages of estimations falling within 10% and 20% of the actual weight.

Results

Using anthropometric data from 15,522 children two weight predictive formulas were developed (Bilbao Formulas). The formulas were validated on a sample of 780 children and estimated weight values with a high degree of intraclass correlation with the real weight (ICC=.93, p<.001) and a mean difference of .63 (SD: 4.3). The percentages of estimations falling within 10% and 20% of the actual weight of the child was 62.2% (95% CI: 58.7–65.6) and 93.1% (95% CI: 91.1–94.8), respectively. Weight estimations were more accurate using Bilbao Formulas than other classical formulas.

Conclusions

Bilbao Formulas would be a valid tool for estimating weight in children in the emergency department and predict weight more accurately than other more commonly used age-based formulas.

Keywords:
Body weight
Paediatrics
Anthropometry
Dosage
Drug therapy
Resumen
Objetivos

Desarrollar y validar una herramienta de estimación del peso en emergencias pediátricas.

Método

Estudio realizado en 2 etapas. Utilizando datos antropométricos informatizados de los servicios de pediatría de atención primaria de Bilbao (País Vasco, España) se elaboraron modelos de regresión lineal para estimar el peso en función de la estatura. Posteriormente, estos modelos fueron aplicados de forma prospectiva a una muestra consecutiva de pacientes pediátricos atendidos en urgencias de 2 hospitales terciarios. Se compararon los pesos estimados con los reales, calculando el coeficiente de correlación intraclase (CCI), media de la diferencia y proporción de mediciones con un error del peso estimado inferior al 10 y 20% con respecto al valour real.

Resultados

A partir de los datos antropométricos de 15.522 menores se desarrollaron 2 fórmulas predictivas del peso (“fórmulas de Bilbao”). Las formulas fueron validadas sobre una muestra de 780 pacientes pediátricos, y estimaron valores del peso con un alto grado de correlación intraclase con respecto al peso real (CCI=0,93; p<0,001) y una media de la diferencia de 0,63 (DE: 4,3). La proporción de error de la estimación del peso con respecto al valour real fue inferior al 10 en el 62,2% (IC 95%: 58,7-65,6) de las mediciones e inferior al 20% en el 93,1% (IC 95%: 91,1-94,8), unos resultados notablemente mejores que los que hubiesen obtenido otras fórmulas clásicas.

Conclusiones

Las “fórmulas de Bilbao” pueden suponer una herramienta válida en la estimación del peso en pacientes pediátricos en urgencias y predicen el peso con mayor precisión que otras fórmulas de uso más habitual basadas en la edad.

Palabras clave:
Peso corporal
Pediatría
Antropometría
Dosificación
Tratamiento Farmacológico

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