J Clin Oncol 2015 Nov 17;33(31):3598-607. Epub 2015 Aug 17.
Brendan J. Guercio, Shuji Ogino, and Edward L. Giovannucci, Harvard Medical School; Kaori Sato, Robert J. Mayer, Shuji Ogino, Jeffrey A. Meyerhardt, and Charles S. Fuchs, Dana-Farber Cancer Institute; Frank B. Hu, Shuji Ogino, Kana Wu, Walter C. Willett, and Edward L. Giovannucci, Harvard T.H. Chan School of Public Health; Shuji Ogino and Edward L. Giovannucci, Brigham and Women's Hospital, Boston, MA; Leonard B. Saltz, Memorial Sloan Kettering Cancer Center, New York, NY; Rex B. Mowat, Toledo Community Hospital Oncology Program, Toledo, OH; Renaud Whittom, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada; Alexander Hantel, Loyola University Stritch School of Medicine, Naperville; Al Benson, Northwestern University; Hedy Kindler, University of Chicago, Chicago, IL; Daniel Atienza, Virginia Oncology Associates, Norfolk, VA; Donna Niedzwiecki and Xing Ye, Duke University Medical Center, Durham; Michael Messino, Southeast Cancer Control Consortium, Mission Hospitals, Asheville, NC; and Alan Venook, University of California at San Francisco Comprehensive Cancer Center, San Francisco, CA.
Purpose: Observational studies have demonstrated increased colon cancer recurrence in states of relative hyperinsulinemia, including sedentary lifestyle, obesity, and increased dietary glycemic load. Greater coffee consumption has been associated with decreased risk of type 2 diabetes and increased insulin sensitivity. The effect of coffee on colon cancer recurrence and survival is unknown.
Patients And Methods: During and 6 months after adjuvant chemotherapy, 953 patients with stage III colon cancer prospectively reported dietary intake of caffeinated coffee, decaffeinated coffee, and nonherbal tea, as well as 128 other items. We examined the influence of coffee, nonherbal tea, and caffeine on cancer recurrence and mortality using Cox proportional hazards regression.
Results: Patients consuming 4 cups/d or more of total coffee experienced an adjusted hazard ratio (HR) for colon cancer recurrence or mortality of 0.58 (95% CI, 0.34 to 0.99), compared with never drinkers (Ptrend = .002). Patients consuming 4 cups/d or more of caffeinated coffee experienced significantly reduced cancer recurrence or mortality risk compared with abstainers (HR, 0.48; 95% CI, 0.25 to 0.91; Ptrend = .002), and increasing caffeine intake also conferred a significant reduction in cancer recurrence or mortality (HR, 0.66 across extreme quintiles; 95% CI, 0.47 to 0.93; Ptrend = .006). Nonherbal tea and decaffeinated coffee were not associated with patient outcome. The association of total coffee intake with improved outcomes seemed consistent across other predictors of cancer recurrence and mortality.
Conclusion: Higher coffee intake may be associated with significantly reduced cancer recurrence and death in patients with stage III colon cancer.