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).
| 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 | 0.823 | |||
| Female | 713 (98.5%) | 710 (98.7%) | 1423 (98.6%) | |
| Male | 11 (1.5%) | 9 (1.3%) | 20 (1.4%) | |
| Breast | 0.599 | |||
| Right | 347 (47.9%) | 355 (49.4%) | 702 (48.6%) | |
| Left | 377 (52.1%) | 364 (50.6%) | 741 (51.4%) | |
| Palpable tumor | <0.001 | |||
| Yes | 288 (39.8%) | 561 (78.0%) | 849 (58.8%) | |
| No | 436 (60.2%) | 158 (22.0%) | 594 (41.2%) | |
| Lesion location | 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 | <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 |
UOQ, upper outer quadrant; LOQ, lower outer quadrant; UIQ, upper inner quadrant; LIQ, lower inner quadrant; BI-RADS, breast imaging reporting and data system