A Phase 3 Trial of the Safety, Tolerability and Efficacy of TransCon hGH Weekly Versus Daily hGH in Children With Growth Hormone Deficiency (GHD)

Annualized height velocity (AHV) at 52 weeks for weekly lonapegsomatropin (TransCon hGH) and daily hGH treatment groups

Number of participants with Treatment-Emergent Adverse Events for the weekly lonapegsomatropin and daily hGH treatment groups

Annualized height velocity (AHV) over 52 weeks for weekly lonapegsomatropin and daily hGH treatment groups. AHV by visit was determined by ANCOVA model with multiple imputation. For each imputed data set, an ANCOVA model with by visit AHV as the dependent variable, treatment and gender as factors, baseline age, baseline peak GH levels (log transformed) at stimulation test, and baseline height SDS - average parental height SDS as covariates were fitted.

Height Standard Deviation Score (SDS) is the number of standard deviations above or below the mean height for age and sex. Height SDS was derived using the LMS method as ((Height/M)^L)-1)/(L x S), where M = median, S = generalized coefficient of variation, and L = power in the Box-Cox transformation, the M, S, L values were obtained from 2000 CDC growth charts for the United States. A Standard Deviation Score of 0 represents the population mean. A higher change from baseline in Height Standard Deviation Score (SDS) indicates a better outcome. The change from baseline in height SDS by visit was determined by ANCOVA model and included baseline age, peak GH levels (log transformed) at stimulation test and baseline height SDS as covariates, as well as treatment and gender as factors.

IGF-1 Standard Deviation Score (SDS) is the number of standard deviations above or below the mean Insulin-like Growth Factor 1 (IGF-1) level for age and sex. IGF-1 SDS was derived using the LMS method as ((IGF-1/M)^L)-1)/(L x S), where M = median, S = generalized coefficient of variation, and L = power in the Box-Cox transformation, the M, S, L values were obtained from Bidlingmaier et al. (2014). A Standard Deviation Score of 0 represents the population mean. Average IGF-1 SDS by visit was determined by ANCOVA. The ANCOVA model included baseline age, peak GH levels (log transformed) at stimulation test, baseline IGF-1 SDS as covariates, as well as treatment and gender as factors. Modeled values begin at Week 13 corresponding with achievement of IGF-1 steady state. Average IGF-1 SDS values by visit for the Lonapegsomatropin group were derived from a population pharmacodynamic model; the average IGF-1 SDS values for the Genotropin group are represented by observed values.

Number of participants with treatment emergent anti-hGH binding antibody formation during the 52 week study. All samples were negative for anti-hGH neutralizing antibodies.