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 (data up to 18 years)
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.
Frequently asked questions
Achondroplasia – growth reference (CLARITY 2021): What does this calculator compute?
Calculates z-scores for length/height, weight (data up to 18 years, tables up to 20 years), head circumference (0–5 years) and weight-for-height in children with achondroplasia using the US natural history study CLARITY (Hoover-Fong 2021; 1 341 individuals, 37 349 measurements) with the asymmetric standard deviations of the publication.
Achondroplasia – growth reference (CLARITY 2021): Which sources is this calculator based on?
Hoover-Fong JE, Alade AY, Hashmi SS, et al.: 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) (2021)