Table 3.

5-year disease-free survival according to selected clinical and pathological variables in univariate analysis

	5-year disease-free survival (%)	Odds ratio	95% confidence interval	P value
Parapharyngeal space invasion	11.8	9.8	2.1–45.1	0.0007
Facial nerve paresis/paralysis	13.0	9.7	2.7–35.2	0.0008
High grade	35.5	8.2	3.0–22.2	0.0001
Histologically positive cervical lymph nodes	18.9	6.7	2.5–18.1	0.0007
Extraparenchymal extension	28.0	5.4	2.4–12.3	0.0003
Clinically positive cervical lymph nodes	29.4	3.4	1.4–8.1	0.005
Positive microscopic margin	30.0	3.1	1.3–7.6	0.012
Deep lobe/whole gland	38.3	2.8	1.3–6.0	0.009
Male gender	37.7	2.6	1.2–5.5	0.016
Age (≥60 years)	38.9	2.4	1.1–5.1	0.027