Table 2.
Summary of the predictive power of individual conventional US parameters as a benign/malignant classifier. Chi-square test (or Fisher's exact test when more appropriate) p values provided for each predictor.
| US parameter | Benign | Malignant | p value |
|---|---|---|---|
| Clearly delineated margin | 93 | 6 | <0.001 |
| Blurred margin | 3 | 22 | |
|
| |||
| Not lobular shape | 77 | 23 | 0.82 |
| Lobular shape | 19 | 5 | |
|
| |||
| Heterogeneous echogenicity | 39 | 19 | 0.01 |
| Homogeneous echogenicity | 57 | 9 | |
|
| |||
| Mainly anechogenic | 17 | 3 | 0.22 |
| Mainly hypoechogenic | 78 | 24 | |
| Mainly isoechogenic | 1 | 0 | |
| Mainly hyperechogenic | 0 | 1 | |
|
| |||
| Absent calcifications | 92 | 21 | <0.001 |
| Present calcifications | 4 | 7 | |
|
| |||
| Present cystic part | 43 | 14 | 0.63 |
| Absent cystic part | 53 | 14 | |
|
| |||
| Present septa in cystic part | 11 | 1 | 0.10 |
| Absent septa in cystic part | 29 | 14 | |
|
| |||
| Unilateral condition | 85 | 28 | 0.06 |
| Bilateral condition | 11 | 0 | |
|
| |||
| No vascularisation | 32 | 5 | 0.01 |
| 1-2 vessels | 23 | 9 | |
| Peripheral vascularisation | 23 | 1 | |
| 3 or more vessels | 18 | 12 | |
|
| |||
| Cervical lymph nodes not enlarged | 88 | 18 | <0.001 |
| Cervical lymph nodes enlarged | 8 | 10 | |