COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Increased growth rate following transfer to daily sc administration from three weekly im injections of hGH in growth hormone deficient children.

The effect of more frequent (daily) injections of human growth hormone (hGH) on growth rate was studied in 16 growth hormone deficient children (12 boys, 4 girls) during 2 years. All had previously been treated with im injection of hGH 2-3 times weekly and in the majority of the patients a waning growth response was observed. For a total weekly dose of 12 IU hGH a daily dose of 2 IU was injected sc at night before sleep. This dosage has been shown by us to imitate the average nocturnal hGH profile in plasma. Growth response on the im treatment was 5.2 +/- 1.2 cm/year (SD) in boys and 5.4 +/- 0.9 cm/year in girls. A significant increase was seen during the first year of sc treatment to 7.9 +/- 2.7 cm in boys and 6.3 +/- 2 cm in girls. During the second year the growth response was still significantly increased in boys (7.2 +/- 1.9 cm). Bone age was more advanced and the period of previous im treatment was longer in girls (6.7 vs 3.6 years) which may be the main cause of the waning second year response (4.7 +/- 1.3 cm/year). Pubertal development occurred in 9 children during treatment. However, the highest growth rates were not found in these children. Absence of antibodies against hGH and local reactions at the injection site is evidence of the safety of the treatment, which was very well accepted by the children. Daily sc injections thus represent an effective alternative to conventional im injections ensuring high acceptance in children with growth hormone deficiency.

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