This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Addo Upper Arm Muscle Area

Upper arm muscle cross-section 1–20 years

About this calculator

Upper arm muscle area from upper arm circumference and triceps skinfold (Frisancho), classified per Addo 2017.

In preterm infants, if a gestational age is given, age is corrected up to month 24 of life for the missing weeks up to 40+0. The z-score (SDS) describes the deviation from the median in standard deviations; the percentile the proportion of the reference population with a smaller value.

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Reference and license

Addo 2017 Arm Composition – 1–20 years.
Addo OY, Himes JH, Zemel BS. Reference ranges for midarm circumference, upper arm muscle area, and upper arm fat area in US children and adolescents aged 1–20 y. Am J Clin Nutr. 2017;105(1):111–120. License: LMS parameters from the R package peditools (jhchou/peditools, MIT license; Chou JH et al. JMIR 2020;22:e16204). Source
Primary article not freely accessible; values from the peditools collection. Arm muscle and fat area according to Frisancho from mid-upper arm circumference and triceps skinfold.

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Note

Calculation aid for healthcare professionals. Percentiles and z-scores describe the position of a measured value in the reference population; clinical assessment remains with the treating physician.