Table 2. Cross-tabulation of women in each BI-RADS density category at first mammogram compared with value at second mammogram (row percent); Group Health, 1996-2006.
| Any NSAID use and BI-RADS density category at first mammogram |
BI-RADS density category at second mammogram |
|||
|---|---|---|---|---|
| Entirely fat, n (%) |
Scattered fibroglandular, n (%) |
Heterogeneously dense, n (%) |
Extremely dense, n (%) |
|
| Nonuser | ||||
| Entirely fat | 869 (45.4) | 972 (50.8) | 67 (3.5) | 6 (0.3) |
| Scattered fibroglandular | 676 (7.5) | 6,077 (67.2) | 2,238 (24.7) | 55 (0.6) |
| Heterogeneously dense | 35 (0.4) | 1,800 (22.1) | 5,721 (70.0) | 614 (7.5) |
| Extremely dense | 2 (0.1) | 45 (3.0) | 747 (49.0) | 729 (47.9) |
| Initiator | ||||
| Entirely fat | 314 (46.8) | 332 (49.5) | 24 (3.6) | <5 (0.1) |
| Scattered fibroglandular | 240 (8.4) | 1,943 (68.3) | 646 (22.7) | 16 (0.6) |
| Heterogeneously dense | 12 (0.5) | 526 (24.8) | 1,439 (67.8) | 146 (6.9) |
| Extremely dense | 0 (0.0) | <5 (0.9) | 185 (54.6) | 151 (44.5) |
| Discontinuer | ||||
| Entirely fat | 49 (46.2) | 54 (51.0) | < 5 (2.8) | 0 (0.0) |
| Scattered fibroglandular | 37 (6.8) | 386 (70.7) | 119 (21.8) | <5 (0.7) |
| Heterogeneously dense | 0 (0.0) | 123 (28.0) | 295 (67.2) | 21 (4.8) |
| Extremely dense | 0 (0.0) | <5 (3.1) | 39 (60.0) | 24 (36.9) |
| Continuer | ||||
| Entirely fat | 51 (44.0) | 63 (54.3) | <5 (1.7) | 0 (0.0) |
| Scattered fibroglandular | 38 (9.1) | 287 (68.3) | 95 (22.6) | 0 (0.0) |
| Heterogeneously dense | <5 (0.4) | 65 (24.3) | 183 (68.6) | 18 (6.7) |
| Extremely dense | 0 (0.0) | <5 (2.9) | 18 (51.4) | 16 (45.7) |
| Mixed | ||||
| Entirely fat | 41 (58.6) | 29 (41.4) | 0 (0.0) | 0 (0.0) |
| Scattered fibroglandular | 33 (9.8) | 219 (65.2) | 83 (24.7) | <5 (0.3) |
| Heterogeneously dense | <5 (0.5) | 58 (26.6) | 149 (68.3) | 10 (4.6) |
| Extremely dense | 0 (0.0) | 0 (0.0) | 15 (42.9) | 20 (57.1) |