Table 3.
Unadjusted performance at facilities by months since implementation of Computer-Aided Detection (CAD)*
| Sample size or performance outcome | All CAD facilities, 1998–2006 (n = 25) |
Group 1 (n = 6)† |
Group 2 (n = 19)‡ |
||||||
| Pre-CAD | 3–12 mo post-CAD | >12 mo post-CAD | Pre-CAD | 3–12 mo post-CAD | >12 mo post-CAD | Pre-CAD | 3–12 mo post-CAD | >12 mo post-CAD | |
| No. of total mammograms | 404 310 | 88 556 | 164 870 | 79 465 | 22 121 | 62 480 | 324 845 | 66 435 | 102 390 |
| No. of mammograms for women with cancer | 1837 | 350 | 663 | 411 | 117 | 266 | 1426 | 233 | 397 |
| Specificity, % (95% CI) | 91.9 (91.8 to 92.0) | 91.5 (91.3 to 91.7) | 91.4 (91.2 to 91.5) | 90.3 (90.1 to 90.5) | 87.5 (87.1 to 87.9) | 88.8 (88.5 to 89.0) | 92.3 (92.2 to 92.4) | 92.8 (92.6 to 93.0) | 92.9 (92.8 to 93.1) |
| Sensitivity, % (95% CI) | 79.7 (77.8 to 81.5) | 83.1 (78.8 to 86.9) | 80.1 (76.8 to 83.1) | 79.8 (75.6 to 83.6) | 88.9 (81.7 to 93.9) | 81.6 (76.4 to 86.1) | 79.7 (77.5 to 81.7) | 80.3 (74.6 to 85.2) | 79.1 (74.8 to 83.0) |
| Positive predictive value, % (95% CI) | 4.3 (4.1 to 4.5) | 3.7 (3.3 to 4.2) | 3.6 (3.3 to 3.9) | 4.1 (3.7 to 4.5) | 3.6 (3.0 to 4.4) | 3.0 (2.6 to 3.4) | 4.4 (4.1 to 4.6) | 3.8 (3.3 to 4.3) | 4.2 (3.7 to 4.6) |
*
CI = confidence interval.
†
Includes Breast Cancer Surveillance Consortium facilities from a previous report that implemented CAD from 1998 to 2002.
‡
Includes additional Breast Cancer Surveillance Consortium facilities that implemented CAD from 1998 to 2006.