Colorectal cancer is one of the most common malignant tumors with obvious regional distribution differences in incidence and prognosis. There are significant differences in economic development, lifestyle, dietary structure and medical resource allocation between Xinjiang (western China) and Shandong (eastern China), which may lead to different epidemiological characteristics and prognosis of CRC patients in the two regions. This study will enroll CRC patients from 7 multicenters in Xinjiang and Shandong, collect retrospective clinical data including demographic information, pathological features, treatment modes and follow-up records, use statistical methods such as Kaplan-Meier survival analysis and Cox proportional hazard regression model to analyze the 5-year OS rate and prognostic factors of patients in the two regions, compare the regional differences of CRC, and construct a Nomogram prognostic prediction model. The study will provide a scientific basis for the personalized treatment and regional public health prevention and control of CRC.
