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Chi-square statistics: Number (%) of positive criteria - BN versus PTC
| BN vs.PTC: | BN | PTC | Χ2 | p-value |
|---|---|---|---|---|
| Mild hypoechogenicity | 55/142 (39%) | 17/45 (38%) | 0.013 | 0.909 |
| Marked hypoechogenicity | 26/142 (18%) | 20/45 (44%) | 12.583 | 0.0004 |
| Microlobulated/ irregular margins | 39/142 (27%) | 27/45 (60%) | 15.839 | 0.00007 |
| Microcalcifications | 10/142 (7%) | 15/45 (33%) | 20.394 | 0.00001 |
| Taller than wide | 17/142 (12%) | 15/45 (33%) | 10.993 | 0.001 |
| No thin halo | 99/142 (70%) | 40/45 (89%) | 6.582 | 0.010 |
