Table 2 Clinicopathological characteristics of breast cancer cases in the SBSP
Characteristics | 1st round screening | 2nd round screening | Total | |||
|---|---|---|---|---|---|---|
No. of cases | Interval cases (N, %) | No. of cases | Interval cases (N, %) | No. of cases | Interval cases (N, %) | |
Overall | 51 | 11 (21.6) | 13 | 2 (15.4) | 64 | 13 (20.3) |
Age group | ||||||
 40- | 6 | 0 | 3 | 0 | 9 | 0 |
 50- | 25 | 7 (28.0) | 3 | 1 (33.3) | 28 | 8 (28.6) |
 60- | 16 | 3 (18.8) | 6 | 1 (16.7) | 22 | 4 (18.2) |
 70- | 4 | 1 (25.0) | 1 | 0 | 5 | 1 (20.0) |
Pathological type | ||||||
 DCIS | 8 | 2 (25.0) | 0 | 0 | 8 | 2 (25.0) |
 DCIS with micro-invasive | 5 | 1 (20.0) | 2 | 0 | 7 | 1 (14.3) |
 IDC | 34 | 6 (17.7) | 9 | 1 (11.1) | 43 | 7 (16.3) |
 Special types | 3 | 2 (66.7) | 2 | 1 (50.0) | 5 | 3 (60.0) |
Size (mm) | ||||||
 DCIS | 13 | 3 (23.1) | 3 | 0 | 16 | 3 (18.8) |
 < 20 | 12 | 3 (25.0) | 5 | 2 (40.0) | 17 | 5 (29.4) |
 20- | 23 | 4 (17.4) | 4 | 0 | 27 | 4 (14.8) |
 50- | 2 | 1 (50.0) | 0 | 0 | 2 | 1 (50.0) |
Axillary lymph node status | ||||||
 Negative | 40 | 10 (25.0) | 12 | 2 (16.7) | 52 | 12 (23.1) |
 Positive | 10 | 1 (10.0) | 0 | 0 | 10 | 1 (10.0) |
Stage | ||||||
 DCIS a | 13 | 3 (23.1) | 3 | 0 | 16 | 3 (18.8) |
 I | 15 | 3 (20.0) | 8 | 2 (25.0) | 23 | 5 (21.7) |
 IIA | 14 | 3 (21.4) | 1 | 0 | 15 | 3 (20.0) |
 IIB | 6 | 1 (16.7) | 0 | 0 | 6 | 1 (16.7) |
 III-IV | 2 | 1 (50.0) | 0 | 0 | 2 | 1 (50.0) |
ER status | ||||||
 Positive | 35 | 7 (20.0) | 9 | 2 (22.2) | 44 | 9 (20.5) |
 Negative | 13 | 4 (30.8) | 3 | 0 | 16 | 4 (25.0) |
PgR status | ||||||
 Positive | 30 | 4 (13.3) | 9 | 2 (22.2) | 39 | 6 (15.4) |
 Negative | 18 | 7 (38.9) | 3 | 0 | 21 | 7 (33.3) |