Table 1 Features and symptoms/signs of incident cases of colorectal cancer, according with tumor’s location
Total N = 942 | Colon N = 650 | Rectum N = 292 | |||||
|---|---|---|---|---|---|---|---|
Mean ± SD | Median | Mean ± SD | Median | Mean ± SD | Median | P | |
Age, years | 68.0 ± 11.4 | 69 | 68.0 ± 11.5 | 69 | 68.1 ± 11.0 | 68 | 0.922 |
N | % | ||||||
Gender | 0.236 | ||||||
Male | 502 | 53.3 % | 338 | 52.0 % | 164 | 56.2 % | |
Female | 440 | 46.7 % | 312 | 48.0 % | 128 | 43.8 % | |
Stage | <0.001 | ||||||
I | 113 | 13.2 % | 60 | 10.0 % | 53 | 20.9 % | |
II | 300 | 35.0 % | 226 | 37.5 % | 74 | 29.1 % | |
III | 271 | 31.7 % | 194 | 32.2 % | 77 | 30.3 % | |
IV | 172 | 20.1 % | 122 | 20.3 % | 50 | 19.7 % | |
Unknown | 86 | - | 48 | - | 38 | - | |
Symptoms/signs before diagnosisa | |||||||
Rectal bleeding | 560 | 59.4 % | 306 | 47.1 % | 254 | 87.0 % | <0.001 |
Change in bowel habits | 489 | 51.9 % | 321 | 49.5 % | 168 | 57.5 % | 0.022 |
Abdominal pain | 454 | 48.2 % | 393 | 60.6 % | 61 | 20.9 % | <0.001 |
Constitutional syndrome | 454 | 48.2 % | |||||
Rectal tenesmus | 163 | 17.3 % | 59 | 9.1 % | 104 | 35.6 % | <0.001 |
Anemia | 126 | 13.4 % | 107 | 16.5 % | 19 | 6.5 % | <0.001 |
Bowel obstruction | 124 | 13.2 % | 115 | 17.7 % | 9 | 3.1 % | <0.001 |
Abdominal mass | 57 | 6.1 % | 51 | 7.9 % | 6 | 2.1 % | 0.001 |
Mucorrhage | 48 | 5.1 % | 30 | 4.6 % | 18 | 6.2 % | 0.320 |
Rectal pain | 38 | 4.0 % | 7 | 1.1 % | 31 | 10.6 % | <0.001 |
Bowel perforation | 29 | 3.1 % | 26 | 4.0 % | 3 | 1.0 % | 0.014 |
Intra-abdominal abscess | 16 | 1.7 % | 14 | 2.2 % | 2 | 0.7 % | 0.106 |
Rectovaginal fistula | 4 | 0.4 % | 3 | 0.5 % | 1 | 0.3 % | 0.999 |
Hematuria | 3 | 0.3 % | 3 | 0.5 % | 0 | 0 % | 0.556 |
Fecal urgency | 2 | 0.2 % | 1 | 0.3 % | 1 | 0.2 % | 0.525 |
Fecal incontinence | 2 | 0.2 % | 1 | 0.3 % | 1 | 0.2 % | 0.525 |
Anal fistula | 2 | 0.2 % | 1 | 0.3 % | 1 | 0.2 % | 0.525 |
Fecaluria | 1 | 0.1 % | 1 | 0.2 % | 0 | 0 % | 0.999 |