Table 3.

Sex steroid levels in serum and CSF of men (n = 47).

	Serum, pg/mL	CSF, pg/mL	CSF–serum ratio, %
DHT	377 ± 172	2.21 ± 0.96	0.70 ± 0.36
Testosterone	4365 ± 1612	49.5 ± 18.9	1.23 ± 0.45
E1	31.7 ± 11.0	1.02 ± 0.29	3.44 ± 1.05
E2	20.5 ± 6.25	0.62 ± 0.34	3.40 ± 2.44
DHEA	2130 ± 1193	73.5 ± 31.7	4.07 ± 1.83
4D	774 ± 259	61.4 ± 29.6	8.08 ± 2.44
P	77.0 ± 9.51	<LLOQ	–

Levels are shown as mean ± s.d. The values for testosterone are a subset of data published previously (16).

4D, androstenedione; DHEA, dehydroepiandrosterone; DHT, dihydrotestosterone; E1, estrone; E2, estradiol; P, progesterone.