Robert A Burger1, Mark F Brady, Michael A Bookman, Bradley J Monk, Joan L Walker, Howard D Homesley, Jeffrey Fowler, Benjamin E Greer, Matthew Boente, Gini F Fleming, Peter C Lim, Stephen C Rubin, Noriyuki Katsumata, Sharon X Liang. 1. Robert A. Burger, Fox Chase Cancer Center, Philadelphia, PA; Mark F. Brady, GOG Statistical and Data Center, Buffalo, NY; Michael A. Bookman, Arizona Cancer Center, Tucson, AZ; Bradley J. Monk, University of California at Irvine, Orange, CA; Joan L. Walker, University of Oklahoma, Oklahoma City, OK; Howard D. Homesley, Wake Forest University Medical Center, Winston-Salem, NC; Jeffrey Fowler, Ohio State University, Columbus, OH; Benjamin E. Greer, University of Washington Medical Center, Seattle, WA; Matthew Boente, Minnesota Oncology Hematology, Minneapolis, MN; Gini F. Fleming, University of Chicago, Chicago, IL; Peter C. Lim, Center of Hope at Renown Regional Medical Center, Reno, NV; Stephen C. Rubin, University of Pennsylvania Cancer Center, Philadelphia, PA; Noriyuki Katsumata, Saitama Medical University/International Medical Center-GOG Japan, Saitama, Japan; and Sharon X. Liang, North Shore University Hospital, Manhasset, NY.
Abstract
PURPOSE: To evaluate risk factors for GI adverse events (AEs) within a phase III trial of bevacizumab in first-line ovarian cancer therapy. PATIENTS AND METHODS: Women with previously untreated advanced disease after surgery were randomly allocated to six cycles of platinum-taxane chemotherapy plus placebo cycles (C)2 to C22 (R1); chemotherapy plus bevacizumab C2 to C6 plus placebo C7 to C22 (R2); or chemotherapy plus bevacizumab C2 to C22 (R3). Patients were evaluated for history or on-study development of potential risk factors for GI AEs defined as grade ≥ 2 perforation, fistula, necrosis, or hemorrhage. RESULTS: Of 1,873 patients enrolled, 1,759 (94%) were evaluable, and 2.8% (50 of 1,759) experienced a GI AE: 10 of 587 (1.7%, R1), 20 of 587 (3.4%, R2), and 20 of 585 (3.4%, R3). Univariable analyses indicated that previous treatment of inflammatory bowel disease (IBD; P = .005) and small bowel resection (SBR; P = .032) or large bowel resection (LBR; P = .012) at primary surgery were significantly associated with a GI AE. The multivariable estimated relative odds of a GI AE were 13.4 (95% CI, 3.44 to 52.3; P < .001) for IBD; 2.05 (95% CI, 1.09 to 3.88; P = .026) for LBR; 1.95 (95% CI, 0.894 to 4.25; P = .093) for SBR; and 2.15 for bevacizumab exposure (aggregated 95% CI, 1.05 to 4.40; P = .036). CONCLUSION: History of treatment for IBD, and bowel resection at primary surgery, increase the odds of GI AEs in patients receiving first-line platinum-taxane chemotherapy for advanced ovarian cancer. After accounting for these risk factors, concurrent bevacizumab doubles the odds of a GI AE, but is not appreciably increased by continuation beyond chemotherapy.
RCT Entities:
PURPOSE: To evaluate risk factors for GI adverse events (AEs) within a phase III trial of bevacizumab in first-line ovarian cancer therapy. PATIENTS AND METHODS: Women with previously untreated advanced disease after surgery were randomly allocated to six cycles of platinum-taxane chemotherapy plus placebo cycles (C)2 to C22 (R1); chemotherapy plus bevacizumabC2 to C6 plus placebo C7 to C22 (R2); or chemotherapy plus bevacizumab C2 to C22 (R3). Patients were evaluated for history or on-study development of potential risk factors for GI AEs defined as grade ≥ 2 perforation, fistula, necrosis, or hemorrhage. RESULTS: Of 1,873 patients enrolled, 1,759 (94%) were evaluable, and 2.8% (50 of 1,759) experienced a GI AE: 10 of 587 (1.7%, R1), 20 of 587 (3.4%, R2), and 20 of 585 (3.4%, R3). Univariable analyses indicated that previous treatment of inflammatory bowel disease (IBD; P = .005) and small bowel resection (SBR; P = .032) or large bowel resection (LBR; P = .012) at primary surgery were significantly associated with a GI AE. The multivariable estimated relative odds of a GI AE were 13.4 (95% CI, 3.44 to 52.3; P < .001) for IBD; 2.05 (95% CI, 1.09 to 3.88; P = .026) for LBR; 1.95 (95% CI, 0.894 to 4.25; P = .093) for SBR; and 2.15 for bevacizumab exposure (aggregated 95% CI, 1.05 to 4.40; P = .036). CONCLUSION: History of treatment for IBD, and bowel resection at primary surgery, increase the odds of GI AEs in patients receiving first-line platinum-taxane chemotherapy for advanced ovarian cancer. After accounting for these risk factors, concurrent bevacizumab doubles the odds of a GI AE, but is not appreciably increased by continuation beyond chemotherapy.
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