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Risk factors for changing thyroid nodules by cox proportional hazard model using backward elimination method
| Variables | All nodules | ≥1 cm nodules | All nodules | ≥1 cm nodules | ||||
|---|---|---|---|---|---|---|---|---|
| Decreasing, |
p-value | Decreasing, |
p-value | Increasing, |
p-value | Increasing, |
p-value | |
| Age | 0.989 (0.980-0.999) | 0.023 | 0.990 (0.981-0.999) | 0.023 | 0.985 (0.968-1.002) | 0.077 | ||
| Sex | ||||||||
| Female | 1.000 (reference) | 1.000 (reference) | ||||||
| Male | 1.172 (0.986-1.392) | 0.072 | 1.236 (0.962-1.589) | 0.098 | ||||
| Initial nodule size (mm) | ||||||||
| <5 | 1.000 (reference) | 1.000 (reference) | ||||||
| 5.0-9.9 | 1.554 (1.209-1.997) | 0.001 | 1.081 (0.894-1.307) | 0.420 | ||||
| 10.0-19.9 | 3.928 (3.052-5.056) | <0.001 | 1.000 (reference) | 1.292 (1.017-1.640) | 0.036 | 1.000 (reference) | ||
| ≥20 | 5.470 (3.942-7.592) | <0.001 | 1.436 (1.077-1.914) | 0.014 | 2.414 (1.749-3.332) | <0.001 | 1.866 (1.323-2.632) | <0.001 |
| Diffuse parenchymal abnormality | 2.351 (1.849-2.991) | <0.001 | 1.748 (1.341-2.280) | <0.001 | ||||
CI: confidence interval