Table 3. Distribution of US-Guided 14-Gauge Core-Needle Biopsy According to Pathologic Results.
| Pathologic Results | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | Total | OR (95% CI) | P |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Benign | 941 (72.7) | 1063 (70.7) | 1013 (73.6) | 1250 (76.3) | 1513 (76.6) | 1575 (75.7) | 1468 (75.8) | 1497 (74.2) | 1467 (74.4) | 1469 (69.6) | 1619 (69.4) | 1320 (64.3) | 16195 (72.6) | 1.035 (1.032, 1.038) | < 0.001 |
| High risk | 37 (2.9) | 30 (2.0) | 26 (1.9) | 45 (2.8) | 74 (3.8) | 64 (3.1) | 52 (2.7) | 57 (2.8) | 81 (4.1) | 111 (5.3) | 111 (4.8) | 108 (5.3) | 796 (3.6) | 1.129 (1.112, 1.146) | < 0.001 |
| Total malignancy | 316 (24.4) | 411 (27.3) | 338 (24.6) | 344 (21.0) | 388 (19.7) | 441 (21.2) | 418 (21.6) | 465 (23.0) | 424 (21.5) | 531 (25.2) | 604 (25.9) | 626 (30.5) | 5306 (23.8) | 1.058 (1.05, 1.067) | < 0.001 |
| DCIS | 35 (2.7) | 44 (2.9) | 33 (2.4) | 47 (2.9) | 49 (2.5) | 62 (3.0) | 57 (2.9) | 62 (3.1) | 69 (3.5) | 94 (4.5) | 101 (4.3) | 98 (4.8) | 751 (3.4) | 1.107 (1.09, 1.124) | < 0.001 |
| Invasive cancer | 281 (21.7) | 367 (24.4) | 305 (22.2) | 297 (18.1) | 339 (17.2) | 379 (18.2) | 361 (18.6) | 403 (20.0) | 355 (18.0) | 437 (20.7) | 503 (21.6) | 528 (25.7) | 4555 (20.4) | 1.051 (1.044, 1.057) | < 0.001 |
Values are presented as numbers of core-needle biopsies with percentages in parenthesis. OR is defined as how many times number of biopsies increased each year. DCIS = ductal carcinoma in situ