Table 1 Characteristics and five-year survival of the study population
Characteristics | n | % | % five-year survival | 95% Confidence interval | |
|---|---|---|---|---|---|
Cancer site | Colon | 3537 | 59.5 | 45.9 | 44.2–47.5 |
Rectosigmoid | 710 | 11.9 | 50.0 | 46.3–53.6 | |
Rectal | 1700 | 28.6 | 53.4 | 51.0–55.7 | |
Age group | <51 | 357 | 6.0 | 64.4 | 59.2–69.2 |
51–60 | 834 | 14.0 | 60.1 | 56.7–63.3 | |
61–70 | 1665 | 28.0 | 55.1 | 52.7–57.4 | |
71–80 | 2062 | 34.7 | 46.2 | 44.0–48.3 | |
>80 | 1029 | 17.3 | 27.7 | 25.0–30.5 | |
Year of diagnosis | 1995 | 488 | 8.21 | 44.1 | 39.6–48.4 |
1996 | 997 | 16.8 | 46.9 | 43.8–50.0 | |
1997 | 1099 | 18.5 | 47.3 | 44.3–50.2 | |
1998 | 1069 | 18.0 | 47.2 | 44.2–50.2 | |
1999 | 1151 | 19.4 | 50.8 | 47.9–53.7 | |
2000 | 1143 | 19.2 | 51.8 | 48.9–54.7 | |
pT stage | pT1 | 280 | 4.7 | 74.6 | 69.1–79.3 |
pT2 | 832 | 14.0 | 70.7 | 67.5–73.6 | |
pT3 | 3372 | 56.7 | 50.6 | 48.9–52.2 | |
pT4 | 1415 | 23.8 | 25.1 | 22.9–27.3 | |
Unknown | 48 | 0.8 | 58.3 | 43.2–70.8 | |
Number of nodes examined | 0–6 nodes | 1792 | 30.1 | 45.4 | 43.1–47.7 |
7–12 nodes | 2218 | 37.3 | 47.7 | 45.6–49.8 | |
>12 nodes | 1856 | 31.2 | 53.0 | 50.7–55.2 | |
Unknown | 81 | 1.4 | 38.2 | 27.8–48.7 | |
pN stage | 0 | 3168 | 53.3 | 61.0 | 59.3–62.7 |
1 | 1616 | 27.2 | 39.8 | 37.4–42.2 | |
2 | 958 | 16.1 | 22.2 | 19.7–24.9 | |
Unknown | 205 | 3.5 | 46.8 | 39.9–53.5 | |
Extramural vascular invasion | Yes | 1061 | 17.8 | 25.0 | 22.4–27.6 |
No | 3139 | 52.8 | 57.4 | 55.7–59.2 | |
Unknown | 1747 | 29.8 | 46.8 | 44.4–49.1 | |
Peritoneal involvement | Yes | 1160 | 19.5 | 24.3 | 21.9–26.8 |
No | 4111 | 69.1 | 55.4 | 53.9–56.9 | |
Unknown | 676 | 11.4 | 48.1 | 44.3–51.8 | |
Tumour perforation (pT4 tumours only) | Yes | 167 | 11.8 | 26.4 | 19.9–33.2 |
No | 198 | 14.0 | 32.3 | 26.0–38.9 | |
Unknown | 1050 | 74.2 | 23.5 | 21.0–26.1 | |
Distance of invasion beyond the muscularis propria (pT3 tumours only)(mm) | 0–1 | 688 | 20.4 | 60.8 | 57.0–64.3 |
1.1–5 | 1086 | 32.2 | 54.2 | 51.2–57.2 | |
5.1–10 | 470 | 13.9 | 43.0 | 38.5–47.4 | |
10.1–15 | 205 | 6.1 | 39.0 | 32.4–45.6 | |
>15 | 214 | 6.4 | 36.9 | 30.5–43.4 | |
Unknown | 709 | 21.0 | 47.5 | 43.8–51.2 | |
CRM status (rectal tumours only) | Involved | 260 | 15.3 | 26.9 | 21.7–32.4 |
Clear | 1203 | 70.8 | 59.2 | 56.4–61.9 | |
Not reported | 237 | 13.9 | 52.7 | 46.2–58.9 | |
Distance to CRM (rectal tumours only)(mm) | ⩽1 | 216 | 17.2 | 33.3 | 27.1–39.6 |
1.1–2 | 149 | 11.9 | 52.4 | 44.0–60.0 | |
2.1–3 | 118 | 9.4 | 56.8 | 47.4–65.1 | |
3.1–4 | 97 | 7.7 | 51.6 | 41.2–60.9 | |
4.1–5 | 97 | 7.7 | 60.8 | 50.4–69.7 | |
5.1–10 | 270 | 21.5 | 58.2 | 52.0–63.8 | |
>10 | 308 | 24.5 | 64.3 | 58.7–69.4 | |
