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Alavi M, Wendel CS, Krouse RS, Temple L, Hornbrook MC, Bulkley JE, McMullen CK, Grant M, Herrinton LJ. Predictors of Bowel Function in Long-term Rectal Cancer Survivors with Anastomosis. Annals of Surgical Oncology. 2017 Nov 1; 24(12):3596-3603.
BACKGROUND: Bowel function in long-term rectal cancer survivors with anastomosis has not been characterized adequately. We hypothesized that bowel function is associated with patient, disease, and treatment characteristics. METHODS: The cohort study included Kaiser Permanente members who were long-term ( = 5 years) rectal cancer survivors with anastomosis. Bowel function was scored using the self-administered, 14-item Memorial Sloan-Kettering Cancer Center Bowel Function Index. Patient, cancer, and treatment variables were collected from the electronic medical chart. We used multiple regression to assess the relationship of patient- and treatment-related variables with the bowel function score. RESULTS: The study included 381 anastomosis patients surveyed an average 12 years after their rectal cancer surgeries. The total bowel function score averaged 53 (standard deviation, 9; range, 31-70, higher scores represent better function). Independent factors associated with worse total bowel function score included receipt of radiation therapy (yes vs. no: 5.3-unit decrement, p < 0.0001), tumor distance from the anal verge ( = 6 cm vs. > 6 cm: 3.2-unit decrement, p < 0.01), and history of a temporary ostomy (yes vs. no: 4.0-unit decrement, p < 0.01). One factor measured at time of survey was also associated with worse total bowel function score: ever smoking (2.3-unit decrement, p < 0.05). The regression model explained 20% of the variation in the total bowel function score. CONCLUSIONS: Low tumor location, radiation therapy, temporary ostomy during initial treatment, and history of smoking were linked with decreased long-term bowel function following an anastomosis. These results should improve decision-making about surgical options.