Table 3.

Association between WHtR and osteoporosis.

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]	1,437	1 (Ref)		1 (Ref)		1 (Ref)		1 (Ref)
Q2 [0.56,0.61]	1,436	0.55 (0.43, 0.72)	<0.001	0.64 (0.48, 0.84)	0.002	0.61 (0.45, 0.82)	0.001	0.63 (0.47, 0.85)	0.003
Q3 [0.61,0.66]	1,436	0.46 (0.33, 0.63)	<0.001	0.54 (0.39, 0.75)	<0.001	0.54 (0.38, 0.76)	<0.001	0.53 (0.37, 0.76)	<0.001
Q4 [0.66,0.94]	1,437	0.41 (0.30, 0.55)	<0.001	0.42 (0.31, 0.58)	<0.001	0.49 (0.35, 0.68)	<0.001	0.49 (0.35, 0.68)	<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.