The result of the hormone concentration of one blood sample was used to determine the accuracy of predicting not only the hormone concentration of a second and third sample drawn 15 minutes apart, but also the mean value of the three samples.
Three
blood specimens from 30 men were assayed individually for testosterone, luteininzing hormone, follicle-stimulating hormone, and prolactin. The predictive correlation of one single hormone value, when compared with the mean of three values, was
0.91
or
greater. It is allowable that drawing one sample is satisfactory in most hormone testes, since the hormone level obtained for one sample has such a high predictive value for the hormone levels of the other two samples.
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