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CLINICAL TRIAL
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
RESEARCH SUPPORT, NON-U.S. GOV'T
Near final height in pubertal growth hormone (GH)-deficient patients treated with GH alone or in combination with luteinizing hormone-releasing hormone analog: results of a prospective, randomized trial.
Journal of Clinical Endocrinology and Metabolism 2000 Februrary
To study the effects of delaying puberty in GH-deficient (GHD) children, we studied 21 GHD (9 boys, 14 girls), treatment-naive, pubertal patients in a prospective, randomized trial. Their chronological age was 14.3 +/- 1.6 yr, and their bone age was 11.3 +/- 1.1 yr (mean +/- SD) at the beginning of the study. Four patients who developed hypogonadotropic hypogonadism were subsequently excluded from the study. Patients were randomly assigned to receive GH + LH-releasing hormone analog (LHRH-A) (n = 7), or GH alone (n = 10). GH and LHRH-A treatment started simultaneously in each patient. GH (Nutropin) was administered at a dose of 0.1 U/kg x day sc, until patients reached a bone age (BA) of 14 yr in girls and 16 yr in boys, and LHRH-A (Lupron depot) was administered at a dose of 300 microg/ kg every 28 days in during 3 yr. We defined GH deficiency as patients with a growth velocity less than 4 cm/yr, BA delay more than 1 yr in relationship to chronological age, GH response to two stimulation tests less than 7 microg/L, associated with low serum insulin-like growth factor I and insulin-like growth factor binding protein 3 levels. Statistical analysis was performed by ANOVA or Kruskall Wallis when variances were not homogeneous. We observed a significant decrease in the rate of BA maturation in the group treated with GH+LHRH-A (1.5 +/- 0.2 yr) compared with the group treated with GH alone (4.2 +/-0.5 yr) during the 3 years of LHRH-A therapy (P < 0.05). This delay in BA maturation produced a significant gain in final height in the group treated with GH+LHRH-A, which reached - 1.3 +/- 0.5 SD score compared with -2.7 +/- 0.3 SD score (P < 0.05) in the group treated with GH alone. These results indicate that delaying puberty with LHRH-A in GHD children during treatment with GH increases final height.
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