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Associations between classification of invasion depth and clinicopathologic variables
| No. (%) | ||||
|---|---|---|---|---|
| Factor | <5 mm | 5–12 mm | >12 mm | P value |
| Nodal metastasis | 3 (3.2) | 41 (44.1) | 49 (52.7) | <.0001 |
| Perineural invasion | 5 (5.1) | 50 (51.0) | 43 (43.9) | .02 |
| Vascular invasion | 1 (2.6) | 17 (44.7) | 20 (52.6) | .07 |
| Pancreas invasion | 4 (3.1) | 69 (53.9) | 55 (42.7) | <.0001 |
