Survival rate and Factors Affecting on Survival of Colorectal Cancer Patients after Surgery at Roi Et Hospital

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Supattra Kumdinpitak


Background and Objective: Colorectal cancer is a serious public health problem worldwide. It is a serious disease because patients are high risk to death. The colorectal cancer treatment by surgery can help to increase survival time of patients. The objective of this study was to study the survival rate and factors affecting on survival of colorectal cancer patients after surgery treatment at Roi Et Hospital.

Methods: this study was retrospective cohort study. All collection was retrieved from medical records of colorectal cancer patients after surgery treatment at Roi Et Hospital between January 1, 2015 and December 31, 2017. All patients were follow-up the vital status until death or end of the study, 31 October 2021. Data analyses were used descriptive statistics, Kaplan-Meier survival curve, Log rank test and Cox proportional hazard model. The statistically significant was set at p<0.05.

Results: of 354 patients with colorectal cancer with surgery treatment, the total follow-up time was 3,103 person-years, with 191 deaths, representing an incidence 61.55 per 1,000 person-years (95%CI: 53.12 to 70.92). The overall survival median survival time was 11.84 years (95%CI: 3.50 to 17.12), with cumulative 1year, 3-years, and 5-years survival rates respectively were 90.11%, 77.40 and 69.21.  The factors affecting on survival postoperative were palliative surgery (Adjusted HR= 5.15; 95%CI: 1.59-9.24), recurrence of disease (Adjusted HR= 4.89; 95%CI: 1.53-8.50) Histology grading were Poorly differentiated (Adjusted HR= 2.25; 95%CI: 1.04-4.81), Undifferentiated (Adjusted HR= 2.80; 95%CI: 3.07-8.52), Cancer Stage II (Adjusted HR = 8.01; 95%CI: 1.07-59.81), Stage III (Adjusted HR= 11.83; 95%CI: 2.98-59.91), Stage IV (Adjusted HR= 6.42; 95%CI: 2.41-46.15), cancer metastasis to liver (Adjusted HR= 3.14; 95%CI: 1.88-9.17), and lung (Adjusted HR = 2.67; 95%CI: 1.19-5.98).

Conclusion: Of 354 colorectal cancer patients after surgery treatment were found out that overall median survival time was 11.84 years. The factors affecting on survival of patients were palliative surgery, histology grading was poorly differentiated, undifferentiated, stage of cancer, and cancer metastasis to liver and lung.


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Kumdinpitak S. Survival rate and Factors Affecting on Survival of Colorectal Cancer Patients after Surgery at Roi Et Hospital. SRIMEDJ [Internet]. 2022 Feb. 28 [cited 2023 Jan. 27];37(1):38-4. Available from:
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