Table 1.

Demographic baseline of OP group and non-OP group

	Osteoporosis group	Non-Osteoporosis Group
	(n = 1455)	(n = 2927)
Current age (yrs)	66.5 ± 8.5*	62.4 ± 7.8
Age at menarche (yrs)	12.4 ± 3.5	12.5 ± 4.1
Age at menopause (yrs)	43.3 ± 5.3	45.2 ± 4.7
Current height (m)	1.52 ± 0.21*	1.59 ± 0.25
Current weight (kg)	54.5 ± 5.6	53.6 ± 4.

* Osteoporosis vs. non-osteoporosis, t-test, P < 0.05