Morris et al developed a model for predicting biologically available testosterone in men. The authors are from the University of Sheffield.
Parameters:
(1) total testosterone in nmol/L
(2) sex hormone binding globulin in nmol/L
X =
= (0.955 * LN(total testosterone)) – (0.228 * LN(sex hormone binding globulin)) – 0.266
biologically available testosterone in nmol/L =
= EXP(X)
Interpretation:
• The total testosterone was considered the best marker of hypogonadism for men, with calculation of bioavailable testosterone useful when the values are borderline.
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Specialty: Urology
