Table 1 Patient demographics and characteristics of the original breast lesions in all cases of ultrasound-guided diagnostic breast biopsy (8-gauge vacuum-assisted biopsy or spring-loaded 14-gauge core biopsy).
| Â | 8-gauge | 14-gauge | All cases | P-value |
|---|---|---|---|---|
Total number of cases | 724 | 719 | 1443 | ----------- |
Age (median, years) | 50 (18-87) | 49 (18-96) | 49 (18-96) | 0.498 |
Gender | Â | Â | Â | 0.823 |
   Female | 713 (98.5%) | 710 (98.7%) | 1423 (98.6%) |  |
   Male | 11 (1.5%) | 9 (1.3%) | 20 (1.4%) |  |
Breast | Â | Â | Â | 0.599 |
   Right | 347 (47.9%) | 355 (49.4%) | 702 (48.6%) |  |
   Left | 377 (52.1%) | 364 (50.6%) | 741 (51.4%) |  |
Palpable tumor | Â | Â | Â | <0.001 |
   Yes | 288 (39.8%) | 561 (78.0%) | 849 (58.8%) |  |
   No | 436 (60.2%) | 158 (22.0%) | 594 (41.2%) |  |
Lesion location | Â | Â | Â | 0.201 |
   UOQ | 364 (50.3%) | 402 (55.9%) | 766 (53.1%) |  |
   UIQ | 155 (21.4%) | 124 (17.2%) | 279 (19.3%) |  |
   LOQ | 115 (15.9%) | 105 (14.6%) | 220 (15.2%) |  |
   LIQ | 58 (8.0%) | 54 (7.5%) | 112 (7.8%) |  |
   Subareolar | 32 (4.4%) | 34 (4.7%) | 66 (4.6%) |  |
BI-RADS classification on ultrasound | Â | Â | Â | <0.001 |
   Category 3 | 78 (10.8%) | 19 (2.6%) | 97 (6.7%) |  |
   Category 4 | 607 (83.8%) | 523 (72.7%) | 1130 (78.3%) |  |
   Category 5 | 39 (5.4%) | 177 (24.6%) | 216 (15.0%) |  |
Lesion size on ultrasound (median, cm) | 1.10 (0.28-5.53) | 2.00 (0.42-9.08) | 1.50 (0.28-9.08) | <0.001 |