Table 3.

Univariable and Multivariable Analysis of Risk Factors for Thyroid Carcinoma

Characteristics	Univariable Analyses			Multivariable Analysis
	OR	95% CI	P	OR	95% CI	P
Age (years)	0.964	0.947–0.980	<0.001	0.959	0.939–0.979	<0.001
Hashimoto’s thyroiditis	2.212	1.173–4.169	0.014	2.437	1.162–5.111	0.018
TSH (<0.35 vs.0.35–4.94)	0.293	0.086–1.003	0.051
(>4.94 vs 0.35–4.94)	2.152	0.609–7.603	0.234
TPOAb (positive)	2.096	1.102–3.986	0.024
TGAb (positive)	2.255	1.190–4.275	0.013
Diameter of maximal nodules (cm) (US)	0.603	0.466–0.780	<0.001	0.706	0.541–0.919	0.010
Composition of maximal nodules (mixed cystic and solid vs cystic)	0.864	0.267–2.797	0.808
(solid vs cystic)	3.000	0.975–9.235	0.055
Punctate echogenic foci	3.202	1.980–5.176	<0.001	2.837	1.598–5.286	<0.001

Abbreviations: TPOAb, thyroid peroxidase antibodies; TGAb, thyroglobulin antibodies; TSH, thyroid-stimulating hormone; US, ultrasonography.