Table 2 Performance measures of digital mammographic screenings for breast cancera
Measure | 2004–2009 | 2010–2020 | ||
|---|---|---|---|---|
Fixed-unit | Hospital | Mobile | Subtotal | |
Recall rate, % | 9.90 (9.83, 9.97) | 8.99 (8.96, 9.01) | 7.30 (7.27, 7.32) | 8.15 (8.13, 8.17) |
Total no. of examinations | 725,410 | 3,762,883 | 3,681,576 | 7,444,459 |
No. of abnormal interpretations | 71,819 | 338,101 | 268,693 | 606,794 |
CDR per 1000 examinations, No | 4.76 (4.6, 4.92) | 4.88 (4.81, 4.95) | 3.26 (3.20, 3.32) | 4.08 (4.03, 4.13) |
No. detecting cancer | 3452 | 18,372 | 12,002 | 30,374 |
Total no. of examinations | 725,410 | 3,762,883 | 3,681,576 | 7,444,459 |
PPV1, abnormal interpretations, % | 4.81 (4.65, 4.96) | 5.43 (5.36, 5.51) | 4.47 (4.39, 4.54) | 5.01 (4.95, 5.06) |
No. of mammograms detecting cancer | 3452 | 18,372 | 12,002 | 30,374 |
Initial BI-RADS category of 0, 3, 4, or 5 | 71,819 | 338,101 | 268,693 | 606,794 |
PPV2, biopsy recommended, % | 34.46 (33.53, 35.39) | 26.18 (25.85, 26.51) | 28.89 (28.45, 29.32) | 27.19 (26.93, 27.45) |
No. of mammograms detecting cancer | 3452 | 18,372 | 12,002 | 30,374 |
Final BI-RADS category of 4 or 5 | 10,017 | 70,176 | 41,546 | 111,722 |
PPV3, biopsy performed, % | 55.08 (53.85, 56.31) | 34.70 (34.3, 35.11) | 37.20 (36.67, 37.73) | 35.65 (35.33, 35.97) |
No. of mammograms detecting cancer | 3452 | 18,372 | 12,002 | 30,374 |
Final BI-RADS category of 4 or 5 with biopsy | 6267 | 52,939 | 32,262 | 85,201 |
Sensitivity, %b | ||||
1-year follow-up | 83.28 (82.18,84.38) | 84.02 (83.46,84.57) | 84.40 (83.68,85.12) | 84.16 (83.72,84.59) |
True positive | 3685 | 14,177 | 8179 | 22,356 |
False negative | 740 | 2697 | 1512 | 4209 |
2-year follow-up | 73.28 (72.1,74.47) | 73.61 (73.01,74.22) | 72.96 (72.17,73.75) | 73.37 (72.89,73.85) |
True positive | 3928 | 15,082 | 8801 | 23,883 |
False negative | 1432 | 5406 | 3262 | 8668 |
Specificity, %b | ||||
1-year follow-up | 90.55 (90.48,90.62) | 91.35 (91.31,91.38) | 92.90 (92.87,92.93) | 92.05 (92.03,92.08) |
True negative | 652,851 | 2,532,504 | 2,146,716 | 4,679,220 |
False positive | 68,134 | 239,937 | 164,063 | 404,000 |
2-year follow-up | 90.57 (90.5,90.64) | 91.37 (91.33,91.4) | 92.92 (92.89,92.95) | 92.07 (92.05,92.1) |
True negative | 652,159 | 2,529,795 | 2,144,966 | 4,674,761 |
False positive | 67,890 | 239,032 | 163,441 | 402,473 |