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  • Title: Risk and outcomes of chemotherapy-induced diarrhea (CID) among patients with colorectal cancer receiving multi-cycle chemotherapy.
    Author: Keefe DM, Elting LS, Nguyen HT, Grunberg SM, Aprile G, Bonaventura A, Selva-Nayagam S, Barsevick A, Koczwara B, Sonis ST.
    Journal: Cancer Chemother Pharmacol; 2014 Oct; 74(4):675-80. PubMed ID: 25055935.
    Abstract:
    BACKGROUND: Diarrhea is a common toxicity of chemotherapy, but the practice of reporting only severe grades (≥ 3) in clinical trials results in misleading conclusions of significance. Epidemiology remains poorly described, and effects of multi-cycle regimens have not been investigated. To better understand the risks, symptom burden and consequences of CID, we studied patients receiving chemotherapy for colorectal cancer (CRC). METHODS: One hundred and fourteen patients receiving FOLFOX (95 patients, 530 cycles), FOLFOX + monoclonal antibodies (10 patients, 49 cycles) or FOLFIRI (9 patients, 50 cycles) were enrolled. CID was identified from diaries at baseline and daily during up to 8 chemotherapy cycles using supplemental questions on the Oral Mucositis Daily Questionnaire, a valid tool for collecting patient-reported outcomes of regimen-related mucosal injury. Patients scored CID severity from 0 "none" to 10 "worst possible," and quantity from "little" to "severe" on a 5-point scale. Quality of life was measured using the FACT-G, and fatigue using the FACIT fatigue scale. RESULTS: CID occurred in 89% of patients on FOLFIRI, 50% on FOLFOX + monoclonal antibodies and 56% on FOLFOX alone. The risk of a first episode was highest during Cycle 1 (35 %) and dropped to <10% during Cycles 3-5. Patients with CID reported poorer quality of life scores than those without CID (77.1 vs 80.7). CONCLUSIONS: Diarrhea occurs more commonly than typically appreciated during chemotherapy for CRC. Risk is highest during first exposure, suggesting variable susceptibility. Identification of this high-risk subgroup for prophylaxis could improve the quality of life.
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