Washington: In a large group of patients with metastatic colorectal cancer, consumption of a few cups of coffee a day was associated with longer survival and a lower risk of the cancer worsening, researchers at Dana-Farber Cancer Institute and other organizations report in a new study.
The findings, based on data from a large observational study nested in a clinical trial, are in line with earlier studies showing a connection between regular coffee consumption and improved outcomes in patients with non-metastatic colorectal cancer. The study is being published today by JAMA Oncology.
The investigators found that in 1,171 patients treated for metastatic colorectal cancer, those who reported drinking two to three cups of coffee a day were likely to live longer overall, and had a longer time before their disease worsened, than those who didn't drink coffee.
Participants who drank larger amounts of coffee - more than four cups a day - had an even greater benefit in these measures. The benefits held for both caffeinated and decaffeinated coffee.
The findings enabled investigators to establish an association, but not a cause-and-effect relationship, between coffee drinking and reduced risk of cancer progression and death among study participants. As a result, the study doesn't provide sufficient grounds for recommending, at this point, that people with advanced or metastatic colorectal cancer start drinking coffee on a daily basis or increase their consumption of the drink, researchers say.
"It's known that several compounds in coffee have antioxidant, anti-inflammatory, and other properties that may be active against cancer," said Dana-Farber's Chen Yuan, ScD, the co-first author of the study with Christopher Mackintosh, MLA, of the Mayo Clinic School of Medicine.
