Table 3.

Univariate and multivariate logistic regression analysis for LLNM in patients with PTMC

Independent variable	Univariate		Multivariate
	OR (95% CI)	P-value	OR (95% CI)	P-value
Sex (female vs male)	0.374 (0.337–0.415)	0.001	0.360 (0.322–0.401)	0.001
Age (≥45 vs <45 years)	0.545 (0.493–0.601)	0.001	0.503 (0.453–0.559)	0.001
Race
Black	1 (reference)		1 (reference)
White	3.141 (2.239–4.407)	0.001	2.441 (1.730–3.443)	0.001
Othera	3.851 (1.971–5.868)	0.001	2.620 (1.802–3.808)	0.001
Size	1.170 (1.150–1.191)	0.001	1.112 (1.091–1.133)	0.001
Histology (PTMC vs FV-PTMC)	0.591 (0.521–0.670)	0.001	0.625 (0.549–0.711)	0.001
Multifocality	2.845 (2.575–3.145)	0.001	2.265 (2.039–2.517)	0.001
ETE
Negative	1 (reference)		1 (reference)
Capsule	2.405 (1.934–2.992)	0.001	2.105 (1.681–2.637)	0.001
Minimal	6.042 (5.295–6.895)	0.001	4.601 (3.994–5.300)	0.001
Gross	9.909 (7.048–13.931)	0.001	7.093 (4.910–10.246)	0.001
Metastasisb	17.880 (11.846–26.987)	0.001	11.948 (7.523–18.975)	0.001

Notes:

^aIncluding American Indian/Alaska Native and Asian/Pacific Islander.

^bIncluding the lungs, bones, and brains.

Abbreviations: LLNM, lateral lymph node metastasis; PTMC, papillary thyroid microcarcinoma; OR, odds ratio; CI, confidence interval; FV-PTMC, follicular variant of papillary thyroid microcarcinoma; ETE, extrathyroidal extension.