The sites of lateral compartment | Lateral lymph node metastasis | Positive rate | χ 2 | P value | |
---|---|---|---|---|---|
No | yes | ||||
 |  |  |  | 123. 60 | < 0.001 |
Level II | 122 | 89 | 42.2% |  | < 0.001a, < 0.001b, 0.918c |
Level III | 70 | 141 | 66.8% |  | < 0.001d, < 0.001e, < 0.001f |
Level IV | 69 | 142 | 67.3% | Â | Â |
Level V | 166 | 45 | 21.3% | Â | Â |