Table V. Risk factors according to histology of N (VI level) in Group A*.
| Variables | Total n=122 | pN0 n=67 (%) | pN1a n=55 (%) | Univariate p value** |
| Sex | ||||
| Female | 97 | 55 (82.1) | 42 (76.4) | |
| Male | 25 | 12 (17.9) | 13 (23.6) | 0.4356 |
| Age | ||||
| <45 yrs | 59 | 28 (41.8) | 31 (56.4) | |
| ≥45 yrs | 63 | 39 (58.2) | 24 (43.6) | 0.1090 |
| cT | ||||
| 1 | 80 | 45 (67.2) | 35 (63.6) | |
| 2 | 36 | 20 (29.8) | 16 (29.1) | |
| 3 | 6 | 2 (3) | 4 (7.3) | 0.5509 |
| Total resection | ||||
| No (positive margins) | 11 | 3 (4.5) | 8 (14.5) | |
| Yes | 111 | 64 (95.5) | 47 (85.5) | 0.0534 |
| Histologic risk | ||||
| Low | 115 | 63 (94) | 52 (94.5) | |
| High | 7 | 4 (6) | 3 (5.5) | 0.9030 |
| Tumour size | ||||
| ≤10 mm | 36 | 20 (30) | 16 (29) | |
| >10 mm | 86 | 47 (70) | 39 (71) | 0.9270 |
| Multifocality | ||||
| No | 66 | 39 (58.2) | 27 (49) | |
| Yes | 56 | 28 (41.8) | 28 (51) | 0.3146 |
| Extracapsularity | ||||
| No | 67 | 43 (64.2) | 24 (43.6) | |
| Yes | 55 | 24 (35.8) | 31 (56.4) | 0.0233 |
| Thyroiditis | ||||
| No | 91 | 43 (64.2) | 48 (87.3) | |
| Yes | 31 | 24 (35.8) | 7 (12.7) | 0.0034 |
| pT | ||||
| 1-2 | 77 | 50 (74.6) | 27 (49.1) | |
| 3-4 | 45 | 17 (25.4) | 28 (50.9) | 0.0036 |
*
4 patients without follow-up were excluded;
**
Chi-square.