Table 6. Correlation matrix between physical traits, lifestyle factors, and bone parameters of the 350 subjects.

	Total body BMD	Osteopenia (−1.0 >T-score ≥−2.5)	Osteoporosis (T-score <−2.5)
Age (years)	0.52**	0.73**	0.46**
Gender	0.53**	0.57**	0.47**
Body weight (kg)	0.75**	0.65**	0.64**
BMI (kg/m2) (under weight and overweight)	−0.67**	−0.48**	−0.58**
S.BAP	0.82**	−0.53**	−0.26**
S. OC	0.49**	−0.57**	−0.37**
sT.Ca	0.95**	−0.95**	−0.94**
s-Ca++	0.87**	−0.68**	−0.38**
Calcium consumption (mg/d)	−0.02**	−0.05**	−0.03**
Smokes daily	0.10*	0.09*	0.14*
Daily coffee / tea consumption	0.18**	0.28**	0.13**
Physical activity level	0.15**	0.11**	0.13**

BMD: bone mineral density (g/cm²); sBAP: serum bone-specific alkaline phosphatase; OC: serum osteocalcin; s-Ca++: serum free calcium; sT-Ca: serum total calcium.*p < 0.05; **p < 0.01