Prognostic Factors and Nomogram Development in Stage III T3-T4 Colon Cancer

Conditional survival analysis for stage III T3-T4 colon cancer identified several risk factors for reduced one-year postoperative conditional survival (COS) and conditional cancer-specific survival (CCSS), including age, PT stage, PN stage, and chemotherapy receipt. This SEER database study of 18,190 patients developed predictive nomograms with a C-index above 0.70, demonstrating reliable and stable performance. The results underscore the utility of conditional survival analysis and the potential for personalized prognosis prediction for colon cancer patients after surgical resection.