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Influence of different factors on survival of patients with colorectal cancer

Colorectal cancer refers to the cancer from the dentate line to the junction of rectosigmoid colon, which is one of the most common malignant tumors of the digestive tract. The treatment of colorectal cancer is controversial, so understanding the risk factors and survival factors of colorectal cancer is of great significance for the diagnosis of patients. This study sampled patients with colorectal cancer from the SEER database. The factors affecting the survival of colorectal cancer patients were analysed by combining principal component analysis and competitive risk model, and the survival time of patients was analysed by combining principal component analysis and linear regression. Finally, the data were predicted. The results show that principal component analysis can effectively reduce the number of variables, and the combination of competitive risk model and linear regression model can effectively analyse and predict the data.