Abstract
In 37 patients with active acromegaly and in 15 patients with inactive acromegaly, activity of bone isoenzyme of serum alkaline phosphatase cor-related ( P< 0.001) with serum concentration of immunoreactive growth hormone. By using stepwise regression analysis, the prediction of serum growth hormone values based on serum levels of bone isoenzyme of serum alkaline phosphatase, gamma-glutamyl transferase and calcium in these patients with acromegaly was within 1 S.D. range in 37 patients and in only 2 patients was it out of 2 S.D. range. By using discriminant analysis, based on bone and liver isoenzymes of serum alkaline phosphatase and urinary hydroxyproline excretion, 87%, 60%, and 97% of the classification of patients with active and inactive acromegaly and healthy adults, respectively, was correct. The multivariate approach offers a quantitative appraisal of the biochemical parameters of peripheral growth hormone action used as an indicator of growth hormone concentration in patients with acromegaly.
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