Table 3.

Multivariate Logistic-Regression Analysis of Lymph Node Metastasis in the Central Region

Factors	β	SE	Wald	P	OR	95% CI OR
Gender	0.958	0.671	2.036	0.154	2.606	0.699–9.714
Distribution of carcinoma	0.968	0.358	7.301	0.007	2.632	1.304–5.310
Maximum diameter	−0.109	0.160	0.461	0.497	0.897	0.656–1.227
Tumor formation pattern	3.226	1.121	8.282	0.004	25.172	2.798–226.477
Boundary	−1.752	1.218	2.070	0.150	0.173	0.016–1.886
Extra-thyroidal expansion	2.112	0.535	15.568	0.000	8.267	2.895–23.606
Calcification	1.082	0.581	3.468	0.063	2.950	0.945–9.209
Blood flow	0.230	0.533	0.186	0.666	1.258	0.443–3.577

Abbreviations: SE, Standard error; OR, odds ratio; CI, confidence interval.