Analysis of the Role of Selective Neck Dissection in Clinically Node-Positive T3/T4 Oral Cancers

Table 4

Association between clinicopathological factors and nodal metastases.

Variable	value (for pN+)	value (for level V pN+)	value (for level IV pN+)
Age	0.95	0.24	0.14
Sex	0.87	0.37	0.53
Smokeless tobacco	0.27	0.13	0.29
Smoking	0.42	0.94	0.52
Alcohol	0.31	0.05	0.68
Multiple comorbidities	0.35	0.51	0.64
Subsite	0.26	0.08	0.08
Crossing midline	0.29	0.61	0.002
Skin excision	0.05	0.58	0.42
pT	0.42	0.07	0.99
Grade	0.68	0.34	0.74
DOI	0.007	0.32	0.49
PNI	0.001	0.28	0.42
LVI	0.01	0.14	0.49
ENE	—	0.001	0.01
Bone invasion	0.18	0.08	0.20
Skin invasion	<0.001	0.66	0.13

DOI: depth of invasion; PNI: perineural invasion; LVI: lymphovascular invasion; ENE: extranodal extension; pN+: pathological node positive.