Table 3. Serum levels of bone mass-regulating steroid hormones in IL-1rKO and IL-1raTG mice.

Mouse	Corticosterone, μg/dl	Testosterone pmol/liter
IL-1rKO†	1.33 ± 0.24	2,546 ± 376
WT†‡	1.11 ± 0.18	2,645 ± 414
IL-1raTG	0.95 ± 0.07	2,583 ± 15*
WT§	0.94 ± 0.09	1,568 ± 31

Data are mean ± SE obtained in 12 mice per condition. ^*, t test; P < 0.05.

^†Ref. 18.

^‡Background mouse strain for the IL-1rKO mice was 129/Sv × C57BL/6.

^§Background mouse strain for the IL-1raTG mice was C57BL/6 × CBA.