Supplementary Material for: Once-Weekly Administration of Sustained-Release Growth Hormone in Korean Prepubertal Children with Idiopathic Short Stature: A Randomized, Controlled Phase II Study

<b><i>Background/Aims:</i></b> To determine the optimal dose of LB03002, a sustained-release, once-weekly formulation of recombinant human growth hormone (rhGH), and to compare its efficacy and safety with daily rhGH in children with idiopathic short stature (ISS). <b><i>Methods:</i></b> This multicenter, randomized, open-label, phase II study included<b><i></i></b> GH-naïve, prepubertal children with ISS, randomized to receive daily rhGH 0.37 mg/kg/week (control, <i>n</i> = 16), LB03002 0.5 mg/kg/week (<i>n</i> = 14), or LB03002 0.7 mg/kg/week (<i>n</i> = 16). The primary endpoint was height velocity (HV) change at week 26. <b><i>Results:</i></b> At week 26, the least square (LS) means for HV change (cm/year) with control, LB03002 0.5 mg/kg/week, and LB03002 0.7 mg/kg/week were 5.08, 3.65, and 4.38, and the LS means for the change in height standard deviation score were 0.65, 0.49, and 0.58, respectively. The lower bound of the 90% confidence interval for the difference between LB03002 0.7 mg/kg/week and the control in the LS mean for HV change (–1.72) satisfied the noninferiority margin (–1.75). Adverse events were generally mild and short-lived. <b><i>Conclusion:</i></b> A once-weekly regimen of LB03002 0.7 mg/kg demonstrated noninferiority to the daily regimen of rhGH 0.37 mg/kg/week in terms of HV increments. LB03002 was well tolerated and its safety profile was comparable with that of daily rhGH.