Table 3.

The Classification of the Serum Boimarkers Which Might Be Related to Ossification of the Spinal Ligament.

Calcium phospahe metabolism marker
	inorganic phpsphate (Pi)
	the tubular reabsorptive capacity for Pi
	Fibroblast growth factor-23 (FGF-23)
Bone turnover marker
	C-terminal extension peptide of type I procollagen (PICP)
	intact osteocalcin
	Glu-osteocalcin
	N-terminal propeptide of type I procollagen (PINP)
	Tartate-resistant acid phosphate 5b (TRAP5b)
	Osteoprotegrin
	Osteopontin
	Sclerostin
	Dickkopf-1 (DKK-1)
Glycoprotein of the extracellular matrix
	Fibronectin
	Glycated hemogrobin
Vitamin K2
	Matetrenone (MK-4)
Hormone
	Leptin
	Parathyroid hormone
Advanced glycation end products
	Pentosidine
Inflammation
	Hypersensitive C-reactive protein (hs-CRP)
	Erythrocyte sedimentation rate (ESR)
MicroRNA
	miR-10a-3p, miR-10a-5p, miR-563, miR-210-3p, and miR-218-3p
Others
	Triglycerides
	Uric acid
	Interleukin 17 receptor C (IL17RC) gene expression
	Chemokine (C-X-C motif) ligand 7 (CXCL7)