Table 3 Univariable analysis of overall-, and disease-free survival and clinicopathological parameters of patients with parotid gland carcinomas

pT classification (T1/2 vs. T3/4)

<0.0001

<0.0001

pN status (N+ vs. N0)

<0.0001

<0.0001

Histopathological grade

<0.0001

<0.0001

Perineural invasion

<0.0001

<0.0001

Lymphovascular invasion

<0.0001

<0.0001

Extracapsular extension

<0.0001

<0.0001

Age <60y

<0.0001

0.0011

Histological subtype

<0.0001

0.0003

Periparotid node involvement

<0.0001

<0.0001

Positive Margins

0.37

0.08