Table 4. Multivariate logistic regression analysis of false-negative rate of SLNs.
| N° (%) | TP | FN | TFN (%) | OR, (IC 95%) |
p Value | |
|---|---|---|---|---|---|---|
| Total | 281 (100) | 58 | 18 | 23.7 | – | – |
| SLN metastasis size | ||||||
| Micrometastasis | 15 (19.7) | 5 | 10 | 66.7 | 13.25 (3.6–48.9) | < 0.001 |
| Macrometastasis | 61 (80.3) | 53 | 8 | 13.1 | 1 | |
| Number of SLNs dissected | ||||||
| > 2 | 26 (34.2) | 16 | 10 | 38.5 | 3.28 (1.1–9.8) | 0.373 |
| ≤ 2 | 50 (65.8) | 42 | 8 | 16.0 | 1 | |
| Tumour Size | ||||||
| > 2 cm | 39 (51,3) | 29 | 10 | 25.6 | 1.25 (0.4–3.6) | 0.508 |
| ≤ 2 cm | 37 (48,7) | 29 | 8 | 21.6 | 1 | |
| Lymphovascular involvement | ||||||
| Absent | 29 (38.2) | 22 | 7 | 24.1 | 1.04 (0.4–3.1) | 0.503 |
| Present | 47 (61.8) | 36 | 11 | 23.4 | 1 | |
| Multicentricity | ||||||
| Present | 8 (10.5) | 6 | 2 | 25.0 | 1.08 (0.2–5.9) | 0.563 |
| Absent | 68 (89.5) | 52 | 16 | 23.5 | 1 | |
Bold values represent statistical significance. TP: true positives, FN: false negative, Se: sensitivity, FNR: false negative rate, SLN: sentinel lymph node, OR: odds ratio.