Table 3.

(A) Binary logistic modeling for clinical staging for regional nodal metastases (≥N1 disease) and (B) Ordinal logistic modeling for clinical staging for advanced regional nodal metastases (grouping as described in methods). Bolded p-value indicates statistical significance (p < 0.05).

(A)
Variable	OddsRatio	LowerBound	UpperBound	p-Value
Intercept	0.930	0.104	8.250	0.948
Age (Years)	0.987	0.959	1.016	0.383
Male	0.788	0.422	1.461	0.451
Private insurance	1.191	0.607	2.333	0.609
Self-pay/uninsured	1.879	0.557	6.671	0.313
Hypopharyngeal	4.769	0.936	35.348	0.076
Laryngeal	1.524	0.747	3.111	0.246
Sinonasal/Nasopharyngeal	0.735	0.215	2.210	0.599
Oropharyngeal	7.766	3.932	16.062	0.000
p16 negative unknown primary	37,492,219.710	0.000	NA	0.983
Year 2020	1.846	1.072	3.219	0.028

(B)
Variable	OddsRatio	LowerBound	UpperBound	p-Value
Age (Years)	0.988	0.959	1.019	0.451
Male	0.511	0.271	0.966	0.040
Private insurance	0.973	0.486	1.948	0.938
Self-pay/uninsured	1.896	0.574	6.260	0.295
Hypopharyngeal	4.482	1.030	19.500	0.047
Laryngeal	2.195	1.024	4.706	0.044
Sinonasal/Nasopharyngeal	0.495	0.102	2.412	0.385
Oropharyngeal	1.415	0.686	2.916	0.348
p16 negative unknown primary	12.915	2.876	57.996	0.001
Year 2020	2.141	1.195	3.836	0.011