Conclusions In this description of a method for estimating weight in adults, we have derived and validated a simplified formula that is at least as precise in adults and adolescents as commonly used paediatric weight estimation tools in children. In adults and children aged 11–15.9 years, over 60%, 90% and 98% of estimates fell, respectively, within 10%, 20% and 30% of actual weights when using the simplified formula. On validation, results in children aged 1–10.9 years were poor. Results A simplified method of MAC-based weight estimation was derived from linear regression equation: weight in kg=4×MAC (in cm)-50. With the Broselow color-coded tape, children can be measured by length and assigned a color zone. NHANES 2009–2010 was used for validation in 9022 subjects (6049 adults aged 16–79 years, 2973 children aged 1–15.9 years). The Broselow system is a color-coded system that helps provide quick and accurate medication dosage and correctly sized equipment for treatment in pediatric emergencies. MAC-based methods of weight estimation were derived in 8498 subjects (5595 adults aged 16–80 years, 2903 children aged 1–15.9 years) from the NHANES 2011–2012 dataset, using linear regression. Methods Data were obtained from the US National Health and Nutrition Examination Survey (NHANES). The aim of this study was to derive and validate an accurate MAC-based method for weight estimation for use in all age groups. The tape ruler is divided into nine colors and is suitable. Paediatric weight is often estimated in emergency situations using methods based on age or height when direct measurement is not possible, and recently, methods based on mid-arm circumference (MAC) have also been developed. Broselow tape is a tape measure based on color-coding with length. Objectives Many drug and fluid regimens in emergency medicine are weight dependent in adults, but no standard adult weight estimation tools exist.
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