Table 1. Analysis of recurrence factors in 275 patients with oral squamous cell carcinoma (OSCC).
| Variable | Total (cases) | Recurrence [cases (%)] | Non-recurrence [cases (%)] | P |
| Gender | 0.633 | |||
| Male | 181 | 61 (33.7) | 120 (66.3) | |
| Female | 94 | 29 (31.9) | 65 (69.1) | |
| Tumor site | 0.966 | |||
| Tongue | 127 | 39 (30.7) | 88 (69.3) | |
| Gums | 80 | 28 (35.0) | 52 (65.0) | |
| Cheek | 31 | 11 (35.5) | 20 (64.5) | |
| Palate | 13 | 4 (30.8) | 9 (69.2) | |
| Floor of the mouth | 24 | 8 (33.3) | 16 (66.6) | |
| Age | 0.796 | |||
| ≤60 years | 168 | 54 (32.1) | 114 (67.9) | |
| >60 years | 107 | 36 (33.6) | 71 (66.4) | |
| T stage | 0.000 | |||
| T1 + T2 | 182 | 37 (20.3) | 145 (84.6) | |
| T3 + T4 | 93 | 53 (57.0) | 40 (43.0) | |
| Differentiation | 0.000 | |||
| Well | 214 | 41 (19.2) | 173 (80.8) | |
| Moderate/poor | 61 | 49 (80.3) | 12 (19.7) | |
| pN stage | 0.000 | |||
| pN0 | 172 | 40 (23.3) | 132 (76.7) | |
| pN1 + pN2 | 103 | 50 (48.5) | 53 (51.5) | |
| Skin flap application | 0.002 | |||
| Yes | 62 | 10 (16.1) | 52 (83.9) | |
| No | 213 | 80 (37.6) | 133 (62.4) | |
| Region of lymph node metastasis | 0.591 | |||
| Regions I-III | 42 | 19 (45.2) | 23 (54.8) | |
| Regions IV and V | 23 | 10 (43.5) | 13 (56.5) | |
| Regions I-V | 38 | 21 (55.3) | 17 (44.7) | |
| Resection margin | 0.001 | |||
| Negative | 221 | 62 (28.1) | 159 (71.9) | |
| Positive | 54 | 28 (51.9) | 26 (48.1) | |
| Perineural invasion | 0.630 | |||
| None | 220 | 70 (31.8) | 150 (68.2) | |
| Present | 55 | 20 (36.4) | 35 (63.6) | |
| Lymphovascular invasion | 0.006 | |||
| None | 242 | 72 (29.8) | 170 (70.2) | |
| Present | 33 | 18 (54.5) | 15 (45.5) |