Table 2.
Analysis of factors affecting the number of harvested lymph nodes.
| Variables | No lymph node on surgery | With lymph node on surgery | Univariate | ||
|---|---|---|---|---|---|
| n = 10 | n = 336 | OR (95%) | p | ||
| Age | |||||
| <29 | 2 (20.0) | 69 (20.5) | 0.97 (0.2–4.7) | 1 | |
| ≥29 | 8 (80.0) | 267 (79.5) | |||
| Gender | |||||
| Male | 0 (0) | 14 (4.2) | — | 1 | |
| Female | 10 (100) | 322 (95.8) | |||
| Graves' disease history | |||||
| Yes | 0 | 4 (1.2) | — | 1 | |
| No | 10 (100) | 332 (918.8) | |||
| Tumor size on US | 9 ± 5.3 (4.3–20) | 7.6 ± 3.6 (2.6–20) | 0.5 (0.13–1.7) | 0.4 | |
| Tumor location | |||||
| Single lobe | 9 (90) | 320 (95.2) | 0.45 (0.05–3.8) | 0.4 | |
| Both lobes/isthmus | 1 (10) | 16 (4.8) | |||
| Surgical procedure | |||||
| Total thyroidectomy | 2 (20) | 53 (15.8) | 0.7 (0.3–6.5) | 0.7 | |
| Conservative thyroidectomy | 8 (80) | 283 (84.2) | |||
| Central neck dissection | |||||
| Both sides | 8 (80) | 290 (86.3) | 0.6 (0.13–3.1) | 0.6 | |
| One side | 2 (20) | 46 (13.7) | |||
| Tumor classification | |||||
| T1a | 7 (70) | 260 (77.2) | — | 0.4 | |
| T1b | 2 (20) | 45 (13.6) | |||
| T3b | 1 (10) | 31 (9.2) | |||
| Microscopic capsular invasion | |||||
| Yes | 3 (30) | 87 (259) | 0.8 (0.21–3.2) | 0.7 | |
| No | 7 (70) | 249 (74.1) | |||
| Thyroiditis | 5.5 ± 0.2 (0–21) | 8.3 ± 0.7 (1–24) | — | 0.002 | |