Table 3.
Bivariate and multivariate logistic regression analysis: odds for FNA.
| Bivariate | Multivariate | |||||
|---|---|---|---|---|---|---|
| Independent Variables | OR | 95% CI | p | OR | 95% CI | p |
| Age (years) | 0.991 | 0.984–0.998 | 0.009 | 0.988 | 0.975–1.001 | 0.062 |
| Sex | 0.716 | 0.071 | ||||
| Male | 1 (ref.) | 1 (ref.) | ||||
| Female | 1.053 | 0.797–1.393 | 1.534 | 0.964–2.440 | ||
| Nodule size (mm) | 1.236 | 1.210–1.263 | <0.001 | - | - | - |
| Nodule size (mm) | <0.001 | <0.001 | ||||
| <20 | 1 (ref.) | 1 (ref.) | ||||
| ≥20–<40 | 9.13 | 6.774–12.305 | <0.001 | 10.97 | 6.108–19.702 | <0.001 |
| ≥40 | 16.501 | 8.100–33.614 | <0.001 | 34.476 | 4.734–251.073 | <0.001 |
| Echogenicity | <0.001 | 0.002 | ||||
| Hyperechoic | 1 (ref.) | 1 (ref.) | ||||
| Isoechoic | 3.615 | 2.089–6.256 | <0.001 | 2.385 | 1.233–4.614 | 0.010 |
| Hypoechoic | 1.234 | 0.772–1.973 | 0.38 | 1.14 | 0.643–2.021 | 0.654 |
| Composition | 0.002 | - | - | - | ||
| Mixed cystic and solid | 1(ref.) | |||||
| Solid | 0.677 | 0.525–0.872 | ||||
| Margins | 0.252 | - | - | - | ||
| Regular | 1 (ref.) | |||||
| Irregular | 1.452 | 0.767–2.751 | ||||
| Microcalcifications | <0.001 | 0.001 | ||||
| Absent | 1 (ref.) | 1 (ref.) | ||||
| Present | 5.505 | 2.418–12.532 | 10.931 | 2.607–45.829 | ||
FNA: fine-needle aspiration; OR: odds ratio.