Table 4.
Sensitivity and specificity by type of screening history (first or subsequent), year, age at screening examination, and type of mammography (screen-film mammography, SFM, or full-field digital mammography, FFDM)
| US | Norway | Spain | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Screen examinations (n) | Sensitivity (%, 95 % CI) | Specificity (%, 95 % CI) | Screen examinations (n) | Sensitivity (%, 95 % CI) | Specificity (%, 95 % CI) | Screen examinations (n) | Sensitivity (%, 95 % CI) | Specificity (%, 95 % CI) | |
| Screening history | |||||||||
| First | 48,822 | 91.9 (89.2- 94.1) | 83.3 (83.0-83.6) | 500,476 | 77.4 (76.1-78.7) | 95.7 (95.6-95.8) | 517,317 | 83.2 (81.9-84.5) | 94.1 (94.0-94.3) |
| Subsequent | 2,555,186 | 82.4 (81.8-83.1) | 91.6 (91.6-91.7) | 970,378 | 74.4 (73.3-75.5) | 97.8 (97.8-97.8) | 1,068,589 | 76.4 (75.3-77.6) | 97.2 (97.2-97.2) |
| Year of screening examination | |||||||||
| 1996-97 | 313,627 | 78.7 (76.7- 80.5) | 91.8 (91.7- 91.9) | 111,531 | 76.9 (74.3-79.6) | 96.3 (96.2-96.4) | 37,826 | 84.3 (79.3-89.4) | 95.1 (95.1-95.1) |
| 1998-99 | 403,672 | 78.7 (77.0-80.4) | 91.2 (91.2- 91.3) | 129,090 | 73.2 (70.3-76.1) | 96.9 (96.8-97.0) | 68,294 | 83.8 (79.9-87.8) | 96.3 (96.3-96.3) |
| 2000-01 | 421,336 | 83.2 (81.7-84.7) | 91.3 (91.2-91.4) | 196,307 | 74.4 (72.2-76.6) | 97.2 (97.1-97.2) | 143,140 | 82.5 (79.7-85.4) | 96.2 (96.2-96.3) |
| 2002-03 | 492,878 | 85.0 (83.5-86.3) | 91.0 (90.9-91.1) | 307,587 | 76.7 (74.9-78.4) | 96.9 (96.8-97.0) | 208,267 | 78.5 (76.0-80.9) | 96.5 (95.5-96.5) |
| 2004-05 | 453,885 | 85.3 (83.7-86.7) | 91.2 (91.1-91.3) | 357,485 | 76.4 (74.7-78.1) | 97.3 (97.2-97.3) | 268,244 | 76.8 (74.5-79.1) | 96.9 (96.8-96.9) |
| 2006-07 | 388,167 | 84.8 (83.3-86.3) | 91.3 (91.2-91.4) | 368,854 | 74.7 (73.1-76.4) | 97.4 (97.3-97.4) | 323,949 | 77.7 (75.7-79.7) | 96.4 (96.4-96.4) |
| 2008-09 | 183,269 | 86.6 (84.4-88.5) | 91.4 (91.2-91.5) | NA | NA | NA | 536,186 | 79.2 (77.7-80.6) | 95.8 (95.8-95.8) |
| Age at screening examination | |||||||||
| 50-59 | 1,603,333 | 82.5 (81.6-83.3) | 90.8 (90.7-90.8) | 863,622 | 72.4 (71.2-73.5) | 96.7 (96.6-96.7) | 936,038 | 74.9 (73.7-76.2) | 95.6 (95.6-95.6) |
| 60-69 | 1,053,501 | 83.8 (82.8-84.6) | 92.1 (92.0-92.1) | 607,232 | 79.2 (78.1-80.4) | 97.7 (97.7-97.7) | 649,868 | 82.1 (80.9-83.3) | 97.1 (97.1-97.1) |
| Type of mammography | |||||||||
| SFM | 2,320,543 | 82.7 (82.0-83.3) | 91.3 (91.3-91.4) | 1,283,482 | 75.9 (75.0-76.8) | 97.1 (97.0-97.1) | 1,211,029 | 78.1 (77.0-79.1) | 96.7 (96.6-96.7) |
| FFDM | 336,291 | 85.8 (84.0-87.3) | 90.9 (90.8-91.0) | 187,372 | 73.5 (71.3-75.6) | 97.2 (97.2-97.3) | 374,877 | 76.4 (75.2-77.7) | 94.6 (94.6-94.6) |