Table 3.

Prevalence rates and odds ratio (95% CI) of osteopenia and osteoporosis by body mass index status.

Variables	Cases (no.)	Prevalence (%) (95% CI)	Age-adjusted odds ratio (95% CI)†
Osteopenia	144	62.6 (56.4, 68.9)	—
BMI ≥ 25	88	65.2 (57.1, 73.2)	1.00
BMI < 25	56	58.9 (48.4, 68.9)	2.2 (0.85, 5.93)
Osteoporosis	58	25.2 (19.6, 30.8)
BMI ≥ 25	25	18.5 (12.0, 25.1)	1.00
BMI < 25	33	34.7 (25.3, 45.2)	4.4 (1.51, 12.87)*

  ^†Odds ratio (with 95% CI) calculated by multiple logistic regression.  *P < 0.05. CI: confidence interval.