Table 5.

Association between WHtR and osteoporosis after adjusting for the covariate of vitamin D.

WHtR	No.	Crude OR (95%CI)	p-value	Model 1 OR (95% CI)	p-value	Model 2 OR (95% CI)	p-value	Model 3 OR (95% CI)	p-value
Q1 [0.36, 0.56]	1,152	1 (Ref)		1 (Ref)		1 (Ref)		1 (Ref)
Q2 [0.56, 0.61]	1,152	0.68 (0.49, 0.94)	0.019	0.78 (0.56, 1.09)	0.141	0.76 (0.53, 1.09)	0.133	0.78 (0.54, 1.13)	0.184
Q3 [0.61, 0.66]	1,152	0.44 (0.31, 0.63)	<0.001	0.51 (0.35, 0.74)	<0.001	0.48 (0.33, 0.70)	<0.001	0.47 (0.32, 0.70)	<0.001
Q4 [0.66,0.94]	1,153	0.46 (0.33, 0.63)	<0.001	0.47 (0.34, 0.66)	<0.001	0.52 (0.37, 0.74)	<0.001	0.52 (0.36, 0.76)	0.001
Trend test			<0.001		<0.001		<0.001		<0.001

WHtR, waist to height ratio; Q, quartiles; OR, odds ratio; CI, confidence interval; Ref: reference.

Crude: no other covariates were adjusted.

Model 1 was adjusted for gender, uric acid.

Model 2 was adjusted for model1 + age, race, poverty income ratio (PIR), educational level, smoking status, drinking status, diabetes mellitus (DM), hemoglobin A1c (HbA1c), alanine transaminase (ALT), serum total bilirubin, serum phosphorus.

Model 3 was adjusted for model2 + cardiovascular disease (CVD), hypertension, aspartate transaminase (AST), serum creatinine, blood urea nitrogen (BUN), serum sodium, total calcium, serum potassim, serum iron, VitD.