Table 3.

The results of multiple linear regression analysis.

Model		Unstandardized coefficient		Standardized coefficient	t	P
		B	Std. error	Beta
1	(Constant)	0.717	0.629		1.141	0.257
	Sex	−0.348	0.204	−0.158	−1.704	0.092
	Ossification of cervical ligament	−0.280	0.097	−0.272	−2.900	0.005
	Ossification of posterior longitudinal ligament	−0.023	0.106	−0.020	−0.216	0.830
	Alkaline phosphatase	−0.291	0.118	−0.221	−2.465	0.015
	Osteocalcin N-terminal molecular fragments	−0.271	0.119	−0.205	−2.283	0.025