Table 3.
NLP results: mammography findings from Group Health in 2008 and 2009
| Diagnostic Exams (N=17656) | Screening Exams (N=76049) | |||
|---|---|---|---|---|
| Mass | N | % | N | % |
| Bilateral | 236 | 1.3 | 117 | 0.2 |
| Left | 977 | 5.5 | 519 | 0.7 |
| Right | 899 | 5.1 | 509 | 0.7 |
| Unilateral | 7 | 0.0 | 0 | 0.0 |
| Woman-level | 86 | 0.5 | 33 | 0.0 |
| No | 15451 | 87.5 | 74871 | 98.5 |
| Calcification | ||||
| Bilateral | 862 | 4.9 | 4342 | 5.7 |
| Left | 1672 | 9.5 | 1912 | 2.5 |
| Right | 1636 | 9.3 | 1984 | 2.6 |
| Unilateral | 9 | 0.1 | 0 | 0.0 |
| Woman-level | 191 | 1.1 | 1831 | 2.4 |
| No | 13286 | 75.3 | 65980 | 86.8 |
| Asymmetry | ||||
| Bilateral | 526 | 3.0 | 1167 | 1.5 |
| Left | 1654 | 9.4 | 2309 | 3.0 |
| Right | 1615 | 9.2 | 2156 | 2.8 |
| Unilateral | 3 | 0.0 | 0 | 0.0 |
| Woman-level | 117 | 0.7 | 426 | 0.6 |
| No | 13741 | 77.8 | 69991 | 92.0 |
| Distortion | ||||
| Bilateral | 41 | 0.2 | 128 | 0.2 |
| Left | 296 | 1.7 | 494 | 0.7 |
| Right | 284 | 1.6 | 501 | 0.7 |
| Unilateral | 1 | 0.0 | 0 | 0.0 |
| Woman-level | 36 | 0.2 | 69 | 0.1 |
| No | 16998 | 96.3 | 74857 | 98.4 |