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

Achondroplasia – growth reference (CLARITY 2021)

Z-scores for length/height, weight, head circumference and weight-for-height in achondroplasia (0–20 years)

Child

Sex

male female

Age

Measured values (at least one)

Length / height (cm)

Weight (kg)

Head circumference (up to 5 years) (cm)

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

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Sources

Growth in achondroplasia including stature, weight, weight-for-height and head circumference from CLARITY: achondroplasia natural history study – a multi-center retrospective cohort study of achondroplasia in the US (Orphanet J Rare Dis 16:522) Hoover-Fong JE, Alade AY, Hashmi SS, et al., 2021. Original paper (free, CC BY 4.0; supplementary files 2 and 3 adopted)

Scientific basis last reviewed: September 2026.

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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.