Table 1.

Precision of assay in intestinal contents

	DHT	Testosterone	Androstenedione
QC-low	12.2% (20)	12.2% (40)	1.0% (7.5)
QC-high	4.9% (200)	0.2% (1,000)	3.1% (375)

Validation of the gas chromatography-tandem mass spectrometry method. Precision is calculated as the coefficient of variation (CV) for the 3 androgens in spiked intestinal contents. Values within parentheses are the concentration for the quality control (QC; in pg/g). Calculated as CV of 4 samples. DHT, dihydrotestosterone; QC-low, QC sample with low concentration; QC-high, QC sample with high concentration.