Table 2.

Correlations between analyte concentrations in urine, saliva and blood samples.

	Spearman correlation coefficient r (n) between
	Urine and Saliva	Urine and Blood	Saliva and Blood
Boys
Estradiol	0.96 (173)	0.98 (42)	0.97 (32)
Estrone	0.96 (179)	0.90 (48)	0.93 (38)
Testosterone	0.93 (173)	0.90 (42)	0.93 (32)
LH	0.82 (179)	0.70 (48)	0.78 (38)
FSH	0.95 (179)	0.84 (48)	0.86 (38)
SHBG	0.93 (179)	0.49 (48)	0.65 (38)
Girls
Estradiol	0.93 (176)	0.91 (35)	0.91 (26)
Estrone	0.95 (180)	0.89 (39)	0.88 (30)
Testosterone	0.91 (176)	0.92 (35)	0.95 (26)
LH	0.85 (180)	0.67 (39)	0.66 (30)
FSH	0.92 (180)	0.90 (39)	0.94 (30)
SHBG	0.94 (180)	0.67 (39)	0.78 (30)