Table 3.

The likelihood ratio for estimating the risk of pulmonary metastasis in presence of high-risk factors such as low jugular node and advanced nodal staging

Dependent variable—presence of pulmonary metastasis
Independent variable	Univariate P value	Multivariate P value		Likelihood ratio		Lower boundary of 95% CI	Upper boundary of 95% CI
Low jugular node	.001	.029		1.846		1.064	3.203
New N staging	.002	.028		1.951		1.073	3.548
In, new N staging, we grouped N staging as N0/N1/N2a and N2b/N2c/N3
Independent variable	Univariate P value	Multivariate P value	Likelihood ratio		Lower boundary of 95% CI		Upper boundary of 95% CI
Low jugular node	.001	.013	.513		.303		.868
N staging	.002	.014	.318		.120		.789
In N staging, we classified N0 in one group and N1, N2, and N3 in another group