Table 3.

Optimal scale regression analysis of ipsilateral level-II lymph node metastasis

Variable	Beta	Standardized coefficient std. error	Df	F	Sig	Tolerance		Importance
						After transformation	Before transformation
Sex	0.119	0.053	1	5.029	0.026	0.913	0.913	0.122
Primary tumor size	0.153	0.058	1	7.033	0.008	0.954	0.954	0.213
Tumor location	0.150	0.055	1	7.298	0.007	0.984	0.984	0.172
Multifocality	0.048	0.042	1	1.321	0.251	0.963	0.963	0.038
ETE	0.101	0.051	1	4.005	0.046	0.964	0.964	0.110
Prelaryngeal LNM	0.142	0.060	1	5.668	0.004	0.907	0.906	0.227
Ipsilateral paratracheal LNM	0.239	0.047	1	3.319	0.069	0.859	0.859	0.119

ETE: Extrathyroid extension; LNM: Lymph node metastasis.