1.

研究对象的基本情况

Characteristics of the participants

Items	All	Non-osteoporosis	Osteoporosis	t/χ2	P value
BMI, body mass index.
Participants, n (%)	5 833	5 430 (93.09)	403 (6.91)
Age/years, x±s	48.32±17.53	46.42±16.40	74.02±10.70	33.26	<0.001
Age group, n (%)				1 111.43	<0.001
<40 years	2 398 (41.11)	2 390 (44.01)	8 (1.99)
40-65 years	2 274 (38.99)	2 216 (40.81)	58 (14.39)
≥65 years	1 161 (19.90)	824 (15.18)	337 (83.62)
Gender, n (%)				289.55	<0.001
Female	2 594 (44.47)	2 251 (41.45)	343 (85.11)
Male	3 239 (55.53)	3 179 (58.55)	60 (14.89)
Height/cm, x±s	166.44±8.26	167.11±7.99	157.39±6.32	23.89	<0.001
Weight/kg, x±s	67.34±13.20	67.86±13.23	60.26±10.40	11.28	<0.001
BMI/(kg/m2), x±s	24.17±3.60	24.17±3.62	24.26±3.45	0.47	0.638