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The growth data of 156 children (100 boys, 56 girls) with growth hormone deficiency (GHD), treated with human growth hormone (GH) for 5.7+/-3.7 years, from 1970-1997, were retrospectively analyzed to assess the efficacy of GH treatment and the factors involved. 62.2% of the studied population had idiopathic GHD (IGHD) and 35.2% had organic GHD (OGHD). At initiation of treatment, chronological age (CA) was 10.1+/-4.0 years in children with IGHD and 9.7+/-4.0 years in those with OGHD, while bone age (BA) was 7.0+/-3.7 and 7.7+/-3.2 years, respectively. The SDS of the growth velocity during the first year of therapy (GV1) was negatively related to CA at start of therapy (r = -0.53, p = 0.01). 109 children have reached final height (FH): 67 boys (FH = 165.3+/-6.3 cm) and 42 girls (FH = 153.9+/-5.4 cm). FH SDS was not significantly different from target height (TH) SDS. In the total group, FH SDS was positively related to height SDS for CA and BA at start of therapy (p = 0.01, p = 0.001, respectively), to TH SDS (r = 0.40, p = 0.001), and to GV1 (r = 0.33, p = 0.001). TH SDS was not different between the IGHD and OGHD groups (-1.02+/-0.8 vs. -0.94+/-6.9). The height gain at puberty did not differ between the groups with induced or spontaneous puberty in boys (23.7+/-8.6 vs. 25.4+/-6.9, not significant), while in girls it was higher in the group with spontaneous puberty (12.7+/-7.3 vs. 20.0+/-9.0, p = 0.008). The age and height at start of puberty was higher in girls and boys with induced puberty. In the total group, the FH SDS of children with induced puberty was higher in comparison with those with spontaneous puberty (-1.0+/-0.8 vs. -1.7+/-0.9, p = 0.001) and it was positively related to the height at start of puberty. When the two sexes were analyzed separately, the difference reached significance only in boys. In conclusion, children with GHD on GH treatment achieved a final height which was comparable to their genetic potential. The FH of children with OGHD was not different from those with IGHD. The age and height at start of puberty were the most significant determining factors for FH. Hence, a better FH might be expected by delaying or arresting puberty.

journal of pediatric endocrinology and metabolism

Growth Response, Pubertal Growth and Final Height in Greek Children with Growth Hormone (GH) Deficiency on Long-term GH Therapy and Factors Affecting Outcome