Table 4. Multivariate regression to identify the independent predictors of BRAF mutation in patients with papillary thyroid microcarcinoma.
| Potential predictor and categories | β | OR | 95% CI | P |
|---|---|---|---|---|
| TTP 2b | ||||
| ≤1 (reference) | 0.000 | 1.000 | – | – |
| >1 | 1.761 | 5.819 | 1.841–18.399 | 0.003 |
| Boundary | ||||
| Unclear (reference) | 0.000 | 1.000 | – | – |
| Clear | −1.176 | 0.309 | 0.096–0.992 | 0.049 |
| Echogenic foci | ||||
| None or large comet-tail artifacts (reference) | 0.000 | 1.000 | – | – |
| Punctate echogenic foci | 1.226 | 3.408 | 1.108–10.481 | 0.032 |
| Peripheral (rim) calcifications | −0.832 | 0.435 | 0.066–2.853 | 0.386 |
| Macrocalcifications | −0.588 | 0.556 | 0.031–10.057 | 0.691 |
| Location | ||||
| Distal from capsules (reference) | 0.000 | 1.000 | – | – |
| Adjacent to capsules | 1.446 | 4.246 | 1.250–14.415 | 0.020 |
| Size (cm) | ||||
| ≤0.5 (reference) | 0.000 | 1.000 | – | – |
| >0.5 | 1.692 | 5.431 | 1.631–18.079 | 0.006 |
| Intercept | −1.799 | – | – | 0.051 |
All variants that showed significance and selective variants that did not show significance in the univariate analysis were included in the multivariate analysis. OR, odds ratio; CI, confidence interval; TTP, time-to-peak.