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Adjusted survival curve of stage II colon cancer patients according to the chemotherapy. (A) Low-risk group (adjusted for sex, age, body mass index [BMI], type of institutions, American Society of Anesthesiologists [ASA], and emergency operation). (B) High-risk group (adjusted for number of risk, sex, age, BMI, type of institutions, ASA, and emergency operation). AC, adjuvant chemotherapy; HR, hazard ratio; CI, confidence interval.
