RPA class | Definition (s) | Patients | Events |
---|---|---|---|
Group 1 (mild risk) | stage I colorectal cancer and age < 76.1 years, | 1,698 | 119 |
Group 2 (moderate risk) | stage II colorectal cancer, age < 76.1 years and LN examined > = 6 stage III colorectal cancer, CCI < 2 | 3,129 | 449 |
Group 3 (high risk) | stage I & II colorectal cancer, age ≥ 76.1 years stage II colorectal cancer, age < 76.1 years and LN examined < 6 stage III colorectal cancer, CCI > = 2, with chemotherapy | 4,605 | 1,502 |
Group 4 (very high risk) | stage III colorectal cancer, CCI > = 2, without chemotherapy | 1,062 | 525 |