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. 2010 Aug 16;11:183. doi: 10.1186/1471-2474-11-183

Table 5.

Risk factors associated with OP

Osteoporosis group Non-Osteoporosis Group X2 p OR (95%)
(n = 1455) (n = 2927)
Postmenopausal (n) 1240 (85.2) * 2159 (73.7) 73.377 0.000 2.052(1.737-2.423)
Body mass index (kg/m2) 25.6 ± 3.1* 23.4 ± 2.8
 < 20 (n) 25(1.7) 91(3.1)
 20-25 (n) 786(54.0) 1300(44.4)
 ≥25 (n) 644(44.3)* 574(19.6) 324.746 0.000 3.441(2.998-3.949)
Education level (n)
 Elementary 747(51.3) 1354(46.2)
 High school or equivalent 456(31.3) 898(30.7)
 College or equivalent 252(17.4) * 675(23.1) 19.208 0.000 0.699(0.595-0.821)
Calcium supplements (n) 699(48.0) * 1897(64.8) 113.186 0.000 0.502(0.442-0.570)
Physical activity (n)
 Never 818(56.2) 1724(58.9)
 Occasionally 405(27.8) 338(11.5)
 Frequently 232(15.9) * 865(29.6) 95.889 0.000 0.452(0.385-0.531)
Smoking status (n)
 Current or former smoker 234(16.1) * 142(4.9) 156.280 0.000 3.759(3.019-4.679)
 Never smoke 1221(83.9) 2785(95.1)
Hypertension (n) 317(21.8)* 442(15.1) 30.339 0.000 1.566(1.334-1.839)
Diabetes mellitus (n) 141(9.7) * 172(5.9) 21.320 0.000 1.719(1.363-2.168)
Hyperostosis (n) 961(66.0)* 188(6.4) 1786.041 0.000 28.342(23.595-34.045)

*: compared with non-OP group, significant difference exited.