Table 2. Comparison of differences in T stage, N stage, and histologic grade between self-detected and screen-detected patients.
| Characteristics | 1995–2000 | 2010 | 2015 | ||||
|---|---|---|---|---|---|---|---|
| Self-detected | Screen-detected | Self-detected | Screen-detected | Self-detected | Screen-detected | ||
| T stage, n (%) | T1 | 163 (17.1) | 3 (75.0) | 231 (40.4) | 34 (66.7) | 219 (35.7) | 40 (67.8) |
| T2 | 620 (65.0) | –a | 289 (50.5) | 15 (29.4) | 350 (57.1) | 17 (28.8) | |
| T3–4 | 173 (17.9) | 1 (25.0) | 52 (9.1) | 2 (3.9) | 44 (7.2) | 2 (3.4) | |
| Mann–Whitney U | 1,113.000 | 10,651.500 | 12,256.000 | ||||
| P | 0.109b | <0.001 | <0.001 | ||||
| N stage, n (%) | N0 | 455 (47.4) | 2 (50.0) | 284 (48.4) | 35 (67.3) | 347 (48.5) | 37 (55.2) |
| N1 | 389 (40.6) | 2 (50.0) | 148 (25.2) | 10 (19.2) | 199 (27.8) | 16 (23.9) | |
| N2–3 | 115 (12.0) | –a | 155 (26.4) | 7 (13.5) | 170 (23.7) | 14 (20.9) | |
| Mann–Whitney U | 1,754.000 | 12,116.500 | 22,349.000 | ||||
| P | 0.868b | 0.007 | 0.325 | ||||
| Histologic grade, n (%) | I | 143 (14.7) | 3 (75.0) | 72 (13.9) | 11 (22.9) | 38 (5.9) | 3 (4.6) |
| II | 591 (60.8) | –a | 372 (71.8) | 35 (72.9) | 527 (81.6) | 57 (87.7) | |
| III | 238 (24.5) | 1 (25.0) | 74 (14.3) | 2 (4.2) | 81 (12.5) | 5 (7.7) | |
| Mann–Whitney U | 1,067.500 | 10,388.000 | 20,270.000 | ||||
| P | 0.100b | 0.017 | 0.491 | ||||
| Age | <40 | 138 (13.3) | 2 (50.0) | 87 (12.2) | 3 (5.0) | 78 (10.1) | 3 (3.9) |
| 40–49 | 428 (41.4) | –a | 218 (30.6) | 28 (46.7) | 233 (30.1) | 24 (31.6) | |
| 50–59 | 259 (25.0) | 2 (50.0) | 257 (36.1) | 20 (33.3) | 390 (37.5) | 27 (35.6) | |
| ≥60 | 209 (20.2) | –a | 150 (21.1) | 9 (15.0) | 173 (22.4) | 22 (28.9) | |
| Mann–Whitney U | 1,529.000 | 20,021.500 | 26,602.000 | ||||
| P | 0.400b | 0.398 | 0.149 | ||||
Notes:
a
There was no data in the current group.
b
The P value was calculated by Fisher’s exact test because the number of patients in the current group was less than five.