title: Comparison of tumour-based (Petersen Index) and inflammation-based (Glasgow Prognostic Score) scoring systems in patients undergoing curative resection for colon cancer.
abstract: After resection, it is important to identify colon cancer patients, who are at a high risk of recurrence and who may benefit from adjuvant treatment. The Petersen Index (PI), a prognostic model based on pathological criteria is validated in Dukes' B and C disease. Similarly, the modified Glasgow Prognostic Score (mGPS) based on biochemical criteria has also been validated. This study compares both the scores in patients undergoing curative resection of colon cancer. A total of 244 patients underwent elective resection between 1997 and 2005. The PI was constructed from pathological reports; the mGPS was measured pre-operatively. The median follow-up was 67 months (minimum 36 months) during which 109 patients died; 68 of them from cancer. On multivariate analysis of age, Dukes' stage, PI and mGPS, age (hazard ratio, HR, 1.74, P=0.001), Dukes' stage (HR, 3.63, P<0.001), PI (HR, 2.05, P=0.010) and mGPS (HR, 2.34, P<0.001) were associated independently with cancer-specific survival. Three-year cancer-specific survival rates for Dukes' B patients with the low-risk PI were 98, 92 and 82% for the mGPS of 0, 1 and 2, respectively (P<0.05). The high-risk PI population is small, in particular for Dukes' B disease (9%). The mGPS further stratifies those patients classified as low risk by the PI. Combining both the scoring systems could identify patients who have undergone curative surgery but are at high-risk of cancer-related death, therefore guiding management and trial stratification.
authors.affiliation: University Department of Surgery, University of Glasgow, Royal Infirmary, UK. campbellroxburgh@doctors.org.uk
authors.forename: C S D
authors.initials: CS
authors.lastname: Roxburgh
authors.forename: J E M
authors.initials: JE
authors.lastname: Crozier
authors.forename: F
authors.initials: F
authors.lastname: Maxwell
authors.forename: A K
authors.initials: AK
authors.lastname: Foulis
authors.forename: J
authors.initials: J
authors.lastname: Brown
authors.forename: R F
authors.initials: RF
authors.lastname: McKee
authors.forename: J H
authors.initials: JH
authors.lastname: Anderson
authors.forename: P G
authors.initials: PG
authors.lastname: Horgan
authors.forename: D C
authors.initials: DC
authors.lastname: McMillan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000473:pathology* / Q000601:surgery*; D005260:Female; D006801:Humans; D007249:Inflammation / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging / Q000379:methods*; D011237:Predictive Value of Tests; D011379:Prognosis; D012107:Research Design; D016019:Survival Analysis