Table 1. Baseline Characteristics of Study Subjects.

	Males (n = 69)		Females (n = 84)		P*
	Age < 50 Years (n = 6)	Age ≥ 50 Years (n = 63)	Premenopausal (n = 7)	Postmenopausal (n = 77)
Age, years	41.2 (7.4)	63.5 (6.0)	49.0 (3.1)	65.9 (6.0)	0.034‡
Body mass index, kg/m2	26.4 (3.4)	24.8 (2.6)	27.5 (3.5)	24.8 (3.3)	0.844†
L1–4 vertebral BMD (g/cm2)	1.19 (0.17)	1.16 (0.15)	1.24 (0.25)	0.98 (0.15)	< 0.001‡
T-score	−1.2 (1.6)	0.4 (1.3)	−1.6 (1.7)	−0.7 (1.6)	< 0.001†

Data are presented as mean and standard deviations (in parenthesis). *p values were obtained in comparison between male and female groups using following methods, ^†Independent t test, ^‡Mann-Whitney U test. BMD = bone mineral density