Androgens by immunoassay and mass spectrometry in children with 46,XY disorder of sex development.

Although the BA graphic shows a mean difference between the methods of only −0.31 units (95% CI: −1.10 at 0.48 ng/mL), it was observed a strong trend of IA to overestimate androstenedione values in comparison to LC-MS/MS when the mean of the two methods was increased, causing non-constant variation at all concentrations ( Fig. 4B ).

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