Table 3. Analysis of the predisposing factors for occult metastasis.
| Variable | No. of patients (%) | P-value |
|---|---|---|
| Patients | 10/67 (14.9) | |
| Age1 | ||
| ≤61 yr | 5/34 (14.7) | >0.99 |
| >62 yr | 5/33 (15.2) | |
| Sex | ||
| Female | 1/23 (4.3) | 0.146 |
| Male | 9/44 (20.5) | |
| Neck management | ||
| Observation | 8/58 (13.8) | 0.614 |
| END | 2/9 (22.2) | |
| T stage | ||
| Early (1, 2) | 3/23 (13.0) | >0.99 |
| Advanced (3, 4) | 7/44 (15.9) | |
| Histological grade | ||
| Well | 1/10 (10.0) | >0.99 |
| Moderate | 6/39 (15.4) | |
| Poorly | 2/16 (12.5) | |
| Missing | 2 | |
| Resection margin | ||
| Negative | 7/48 (14.6) | >0.99 |
| Positive | 3/19 (15.8) | |
| Bone invasion | ||
| Negative | 3/23 (13.0) | >0.99 |
| Positive | 7/44 (15.9) |
(END: elective neck dissection)
161 years is the median age of the subjects.