Table 2.

Risk factors of CNM.

	Univariate		Multivariate
	OR (95% CI)	p value	B (SE)	p value	OR (95% CI)
Age (<45 vs. ≥45)	0.374 (0.280-0.499)	<0.001	-1.027	<0.001	0.358 (0.266-0.483)
Gender (female vs. male)	1.719 (1.249-2.365)	0.001	0.615	<0.001	1.849 (1.316-2.599)
Tumor size (≤0.5 vs. >0.5 cm)	2.356 (1.768-3.139)	<0.001	0.842	<0.001	2.320 (1.7213-3.129)
Unilateral multifocality	1.673 (1.174-2.384)	0.004	0.507	0.008	1.661 (1.142-2.416)
Bilaterality	1.405 (0.990-1.995)	0.056	/	/	/
Capsular invasion	1.534 (1.087-2.163)	0.014	/	/	/
Extrathyroidal invasion	3.648 (1.495-8.898)	0.002	1.023	0.033	2.783 (1.083-7.148)
Hashimoto	0.811 (0.566-1.162)	0.253	/	/	/
Simple goiter	0.780 (0.590-1.030)	0.08	/	/	/