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

Mramba MUAC / Mid-upper arm circumference by Mramba

Upper arm circumference 5–19 years

About this calculator

Z-score and percentile of mid-upper arm circumference according to the Mramba 2017 (BMJ) reference for school-age children and adolescents.

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

Mramba 2017 – 5–19 years.
Mramba L, Ngari M, Mwangome M, et al. A growth reference for mid upper arm circumference for age among school age children and adolescents, and validation for mortality. BMJ. 2017;358:j3423. License: CC BY 4.0 (BMJ Open Access) – LMS from the web appendix of the publication. Source

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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.