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Comparison of nodal positivity in the primary and recurrent cases. n represents the number of overall specific neck levels dissected.
| Neck level (n) | Primary group | Recurrent group | P value |
|---|---|---|---|
| I (14) | 0% | 3.4% | 0.62 |
| II (55) | 50% | 41% | 0.30 |
| III (57) | 57% | 62% | 0.87 |
| IV (57) | 46% | 76% | 0.05 |
| V (43) | 21% | 24% | 0.76 |
