Journal of Clinical Endocrinology & Metabolism, Vol 53, 1213-1217, Copyright © 1981 by Endocrine Society

ARTICLES

A dose-response curve for human growth hormone

SD Frasier, G Costin, BM Lippe, T Aceto Jr and PF Bunger

Although human GH (hGH) has been administered to GH-deficient patients for over 20 yr, there are minimal published data on the relationship of response to dose. We have given hGH on the basis of body weight to 93 prepubertal GH-deficient patients over an initial 12 months of therapy. Their annual growth rate while receiving hGH was 5.58 +/- 2.30 (+/- SD) cm at a dose of 30 mIU/kg, three times a week (tiw; n = 27); 7.31 +/- 1.75 (+/- SD) cm at a dose of 60 mIU/kg, tiw (n = 38); 7.22 +/- 3.12 (+/- SD) cm at a dose of 80 mIU/kg, tiw (n = 12); and 8.94 +/- 1.19 cm (+/- SD) at a dose of 100 mIU/kg, tiw (n = 16). Doubling the dose from 30 to 60 mIU increased the mean rate of growth 1.3 times, and increasing the 30 mIU dose by a factor of 3.3 increased the mean rate of growth 1.6 times. The response (y) as a function of the log-dose (x) is defined by the equation y = -3.12 + 5.80 log x. When the effect of hGH is expressed as the increase in growth rate while receiving therapy, the log-dose relationship is defined by the equation y = -6.09 + 5.67 log x. This dose-response curve provides data which are useful in choosing the best dose of hGH for an individual patient. It also allows a more accurate projection of the costs and benefits of hGH therapy.

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