LAUSR

Background/Aim: Previous studies have shown that postoperative adjuvant chemotherapy improves overall survival in patients with stage III colorectal cancer (CRC). However, adjuvant chemotherapy may not be necessary for some patients. This study aimed to develop a new nutritional-inflammation score, which would be useful in identifying a favorable prognosis group among stage III CRC patients. Patients and Methods: This retrospective study included 262 patients with stage III CRC who underwent curative surgery and were divided into two groups: a training set (TS) of 162 patients and a validation set (VS) of 100 patients. In the TS, clinicopathological factors were tested using a Cox regression model, and a new prognostic model was developed. Results: Multivariate analyses in TS revealed that lymph node metastasis (N2) (p=0.002), low albumin (p=0.017), high monocyte counts (p=0.008), and low platelet counts (p=0.018) were independent risk factors for disease free survival (DFS). The Kansai prognostic score (KPS) was assessed by 1 point each for <3.5 g/dl albumin level, >450 monocyte counts, and <1.65×105 platelet counts. Using KPS, DFS and overall survival (OS) were validated in VS. The C-indices of KPS to predict DFS and OS in TS were 0.707 and 0.772. It was validated in VS that the C-indices of KPS to predict DFS and OS were 0.618 and 0.708, respectively. A high KPS was a significant predictor of DFS and OS. Conclusion: KPS serves as a new model for the prognosis of patients with stage III CRC.