Table 4. Cox survival analysis.

Multivariate Cox model for patient survival.

Variable	Coefficient (ß)	Exp (ß)	Standard error	Z statistic	P-value
Age	0.0074	1.0074	0.0089	0.8230	0.41
Gender: Male	0.6705	1.9552	0.3006	2.2310	0.02*
Comorbidities: Yes	0.0867	1.0906	0.2384	0.3640	0.71
Tumour site
Floor of the mouth	-0.6017	0.5479	0.3139	-1.9170	0.05*
Oropharynx	-0.6129	0.5418	0.4180	-1.4660	0.14
Other	-0.0025	0.9975	0.2749	-0.0090	0.99
TNM: III-IV	1.0334	2.8106	0.2413	4.2830	<0.001*
T14 (3–18) days	0.5651	1.7597	0.2947	1.9180	0.05*
T14 (26–55) days	0.5980	1.8185	0.2918	2.0490	0.04*

(*: statistically significant)