Table 2. Correlation coefficients (ρ) between serum biochemical markers and bone histomorphometric parameters (Spearman’s test).

Total n = 36	FGF-23	iPTH	BSAP	TRAP5b	Phosphorus
Turnover
Activation frequency (y–1)	0.60**	0.66**	0.71**	0.58**	0.64**
Bone formation rate/bone surface (mm3/cm2/y)	0.57**	0.71**	0.75**	0.64**	0.66**
Osteoblast number/bone perimeter (N/mm)	0.38*	0.73**	0.71**	0.58**	0.62**
Osteoclast number/bone perimeter (N/mm)	0.28	0.69**	0.62**	0.48*	0.46**
Mineralization
Lamellar osteoid thickness (µm)	0.08	0.67**	0.75**	0.65**	0.42*
Osteoid maturation time (Days)	–0.46**	0.03	–0.05	0.18	–0.21
Mineralization lag time (Days)	–0.69**	–0.31	–0.36*	–0.12	–0.51**
Volume
Bone volume/tissue volume (%)	0.38*	0.25	0.42*	0.21	–0.04
Trabecular thickness (µm)	0.32	0.09	0.28	0.08	–0.06
Cortical thickness (µm)	–0.60**	–0.43*	–0.31	–0.15	–0.46*

*p < 0.05 (2-tailed); **p < 0.01. (2-tailed).