Table 1 Baseline characteristics of interval cancers at subsequent, biennial screening mammography
A SFM with prior SFM | B FFDM with prior SFM | C FFDM with prior FFDM | |
|---|---|---|---|
Interval cancers, n | 144 | 159 | 139 |
Ductal carcinoma in situ, n (%) | 8 (5.6) | 9 (5.7) | 8 (5.8) |
Invasive cancer, n (%) | 136 (94.4) | 150 (94.3) | 131 (94.2) |
Visibility of interval cancer at latest screen | |||
Missed, n (%) | 42 (29.2) | 35 (22.0) | 39 (28.1) |
Minimal sign, n (%) | 31* (21.5) | 20 (12.6) | 20 (14.4) |
Occult, n (%) | 71† (49.3) | 104 (65.4) | 80 (57.6) |
Interval between latest screen and interval cancer | |||
≤ 1 year, n (%) | 52 (36.1) | 59 (37.1) | 53 (38.1) |
> 1 year, n (%) | 92 (63.9) | 100 (62.9) | 86 (61.8) |