Table 3 Histological comparison between cases with or without symptoms at screening day 0 visit and between cases with or without family history of colorectal cancer
| Â | Symptoms that may suggest colorectal cancer at the outset | Family history of colorectal cancer | ||||
|---|---|---|---|---|---|---|
Yes 55 cases | No 1,349 cases | P-value | Yes 117 cases | No 1,287 cases | P-value | |
Screening colonoscopy | ||||||
 Colorectal cancer | 3 (5.5) | 15 (1.1) | 0.031b | 4 (3.4) | 14 (1.1) | 0.056b |
Stage | Â | Â | Â | Â | Â | Â |
 0 | 1 | 4 |  | 2 | 3 |  |
 I | 0 | 6 |  | 0 | 6 |  |
 IIA | 1 | 4 |  | 1 | 4 |  |
 IIIB | 0 | 1 |  | 1 | 0 |  |
 IVA | 1 | 0 |  | 0 | 1 |  |
 High risk adenoma | 3 (5.5) | 95 (7.0) |  | 0 (0.0) | 98 (7.6) |  |
 Low risk adenoma | 10 (18.2) | 148 (11.0) |  | 13 (11.1) | 145 (11.3) |  |
 Hyperplastic polyp | 3 (5.5) | 116 (8.6) |  | 14 (12.0) | 105 (8.2) |  |
 Other pathological diagnosisa | 0 (0.0) | 18 (1.3) |  | 2 (1.7) | 16 (1.2) |  |
 No colorectal tumor | 36 (65.5) | 957 (70.9) |  | 84 (71.8) | 909 (70.6) |  |