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, Chou JH et al. JMIR 2020;22:e16204; the MIT licence covers the software, rights to the reference data remain with the original publication). Source
LMS parameters 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.

Review date of the German original: 2026-11-05 · Methodology

Frequently asked questions

Addo Upper Arm Muscle Area: What does this calculator compute?

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

Addo Upper Arm Muscle Area: Which sources is this calculator based on?

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.