Table 3.
Multivariate logistic regression analysis of SLN metastasis based on preoperative data in the training cohort.
| Variables | β# | P value | OR (95% CI) |
|---|---|---|---|
| Age (per 1-year increase) | -0.03 | 0.059 | 0.97 (0.94-1.00) |
| BMI (per 0.1kg/m2 increase) | 0.14 | 0.071 | 1.14 (0.99-1.31) |
| Ki67 (per 1% increase) | 0.02 | 0.016 | 1.02 (1.00-1.04) |
| Tumor size* (per 0.1cm increase) | 1.46 | <.001 | 4.29 (2.88-6.39) |
| Tumor margin* (distinct vs. indistinct) | -1.25 | 0.015 | 0.29 (0.10-0.79) |
| Calcification* (present vs. absent) | 2.69 | <.001 | 14.79 (6.45-33.94) |
| Aspect ratio* (<1 vs. ≥1) | -3.06 | <.001 | 0.05 (0.02-0.13) |
| Constant | 0.19 | 0.937 | 1.20 (0.01-107.65) |
#Unstandardized β coefficients were calculated from the multivariate logistic regression analysis based on stepwise regression (AIC: 267.85).
*Variables based on US results.
CI, confidence interval.