(c) Schindl prognostic system

Risk	N	Prognostic score	Median survival (months)	5-year survival (%)
Good	33	0–10	36	62
Mod	172	11–25	34	20
Poor	65	>25	11	0

Prognostic score = [(4 × Dukecode) + (6 × Metcode3) + (6 × lnAlkphos) + (2 × lnCEA) − Albumin] + 22, where Dukecode indicates Dukes stage A/B (score, 0) or C (score, 1), Metcode3, 1 to 3 metastases (score, 0) or more than 3 metastases (score, 1), lnAlkphos, natural logarithmic function of the serum concentration of alkaline phosphatase (U/L), lnCEA, natural logarithmic function of the serum concentration of CEA (μg/L), and Albumin, the serum concentration of albumin (g/dL) [17].