Table 3.
Univariate logistic regression model and multivariable backwards logistic regression model for associations of variables with systemic metastasis positivity
| Variable | RLN metastasis (n = 742) | No RLN metastasis (n = 2587) | Univariate analysis | Multivariable analysis | ||
|---|---|---|---|---|---|---|
| Odds ratio (95% CI) | p value | Odds ratio (95% CI) | p value | |||
| Age (year) | ||||||
| ≥ 50 | 208 (79%) | 2514 (83%) | Reference | |||
| < 50 | 54 (21%) | 524 (17%) | 1.25 (0.91, 1.71) | 0.170 | ||
| Tumor size (cm) | ||||||
| < 1 | 32 (13%) | 843 (28%) | Reference Group | Reference group | ||
| 1–2 | 91 (36%) | 1303 (43%) | 1.84 (1.22, 2.78) | 0.004 | 1.69 (1.05, 2.74) | 0.033 |
| 2–5 | 133 (52%) | 873 (29%) | 4.01 (2.70, 5.97) | < 0.001 | 2.95 (1.82, 4.78) | < 0.001 |
| Grade | ||||||
| 1 | 33 (13%) | 778 (26%) | Reference Group | Reference group | ||
| 2 | 113 (44%) | 1416 (47%) | 1.88 (1.26, 2.80) | 0.002 | 1.34 (0.86, 2.10) | 0.191 |
| 3 | 113 (44%) | 818 (27%) | 3.26 (2.18, 4.86) | < 0.001 | 2.33 (1.48, 3.65) | < 0.001 |
| LVI | ||||||
| Negative | 181 (72%) | 2585 (87%) | Reference group | |||
| Positive | 69 (28%) | 390 (13%) | 2.53 (1.88, 3.40) | < 0.001 | ||
| RLN | ||||||
| Negative | 143 (55%) | 2431 (80%) | Reference group | Reference group | ||
| Positive | 119 (45%) | 616 (20%) | 3.28 (2.54, 4.25) | < 0.001 | 2.49 (1.85, 3.34) | < 0.001 |
| ER | ||||||
| Positive | 193 (74%) | 2452 (81%) | Reference group | |||
| Negative | 67 (26%) | 571 (19%) | 1.49 (1.11, 2.00) | 0.008 | ||
| PR | ||||||
| Positive | 177 (68%) | 2263 (75%) | Reference group | |||
| Negative | 82 (32%) | 771 (25%) | 1.36 (1.03, 1.79) | 0.028 | ||
| HER2/neu | ||||||
| Negative | 182 (79%) | 2253 (81%) | Reference group | |||
| Positive | 48 (21%) | 529 (19%) | 1.12 (0.81, 1.57) | 0.492 | ||
ER estrogen receptor; LVI lymphovascular invasion; PR progesterone receptor; RLN regional lymph node