Table 2.
Univariate and multivariate logistic regression analyses in the primary cohort
| Variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | |
| Age (years) | ||||
| ≤50 | Referent | Referent | ||
| >50 | 4.460 (2.154-9.236) | <0.001 | 2.767 (1.046-7.320) | 0.040 |
| Tumor size (mm) | ||||
| ≤20 | Referent | Referent | ||
| >20 | 7.491 (3.847-14.587) | <0.001 | 3.579 (1.414-9.061) | 0.007 |
| Tumor location | ||||
| UOQ | Referent | |||
| Othersa | 1.057 (0.586-1.906) | 0.853 | ||
| Mass shape | ||||
| Oval or round | Referent | Referent | ||
| Irregular | 7.227 (2.991-17.462) | <0.001 | 1.414 (0.434-4.603) | 0.565 |
| Mass margin | ||||
| Circumscribed | Referent | Referent | ||
| Non-circumscribedb | 11.326 (5.854-21.916) | <0.001 | 3.547 (1.328-9.470) | 0.012 |
| Internal enhancement characteristics | ||||
| Non-homogeneousc | Referent | Referent | ||
| Homogeneous | 0.037 (0.018-0.079) | <0.001 | 0.116 (0.046-0.292) | <0.001 |
| Kinetics curve | ||||
| Persistent | Referent | Referent | ||
| Non-persistent | 25.330 (11.044-58.076) | <0.001 | 7.875 (2.547-24.344) | <0.001 |
Note. UOQ = upper outer quadrant. aOthers: UIQ = upper inner quadrant, LIQ = lower inner quadrant, LOQ = lower outer quadrant. bNon-circumscribed: speculated, irregular. cNon-homogeneous: heterogeneous, rim.