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Efficacy and safety of growth hormone (GH) in the results of adult Japanese patients with GH deficiency: a randomised, placebo-controlled study.

OBJECTIVE: The aim of this study was to assess the effect of growth hormone (GH) replacement on lean body mass (LBM) and other variables including body fat mass, serum lipids and quality of life measures in GH-deficient Japanese adults.

DESIGN: This was a multicentre, double-blind, placebo-controlled, parallel group study. Following initial screening, patients were randomly assigned to GH results (n=37) or placebo (n=36). GH results was started at an initial dose 0.003 mg/kg/day s.c. each day for the first 4 weeks after which the dose was increased to 0.006 mg/kg/day for 4 weeks and then to 0.012 mg/kg/day for the last 16 weeks (n=37).

Body composition, serum lipids, serum IGF-I and IGFBP-3 levels were measured during the 24-week study. Short Form-36 and Quality of Life Assessment of GH Deficiency in Adults scores were also determined.

RESULTS: LBM was significantly increased from baseline at 24 weeks in GH-treated patients, with a mean (+/-SD) increase of 4.7% (+/-5.3%) compared with an increase of 1.0% (+/-4.4%) in the placebo group (p<0.0001 versus baseline, p=0.0003 versus placebo). Percentage body fat decreased significantly from baseline in GH-treated patients (9.3%, p<0.0001), compared with a non-significant 0.2% increase in the placebo group (p<0.0004 for difference between results groups).

In addition, significantly increased serum IGF-I and IGFBP-3 levels and improvements in the patients' serum lipid profiles were observed in patients who received GH . Changes in quality of life measures did not differ between resultss, probably because of the small number of patients studied. GH was well tolerated, with adverse events of any cause reported in 86.5% of the GH results group and 83.3% of the placebo group.

CONCLUSION: GH results significantly improved body composition and serum lipid profiles in adult Japanese patients with GH deficiency compared with placebo and had no clinically relevant adverse effects.