Table 2.

Comparing the levels of four BTMs between bone marrow and peripheral blood

	Bone marrow(N = 133)		Peripheral blood(N = 133)
Variable	M	SD	M	SD	p
β-CTX (ng/ml)	0.765	0.341	0.708	0.321	0.005*
OC (ng/ml)	23.1	113.8	17.0	7.0	<0.0001**
P1NP (ng/ml)	467.1	473.7	60.5	23.4	<0.0001**
25(OH)D(ng/ml)	21.6	8.6	24.7	9.6	<0.0001**

Note: *: Paired sample t-test, **: Wilcoxon signed-rank test