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Data on Colorectal Cancer Detailed by Researchers at Clinical Epidemiology Unit


By a News Reporter-Staff News Editor at Preventive Medicine Week -- Researchers detail new data in Colorectal Cancer. According to news reporting from Genoa, Italy, by NewsRx journalists, research stated, "Patients who undergo polypectomy are at increased risk of adenoma recurrence. The preventive potential of vitamins (A, C and E) and selenium supplementation represent an interesting opportunity for colorectal cancer prevention."

The news correspondents obtained a quote from the research from Clinical Epidemiology Unit, "To assess the efficacy of a combination of these micronutrients in reducing the incidence of recurrent adenomas in subjects on post-polypectomy endoscopic follow-up, a double-blind placebo-controlled randomized trial was started in Italy in 1988. A total of 411 patients were randomized to receive either an active compound (200 mcg selenium, 30 mg zinc, 2 mg vitamin A, 180 mg vitamin C, 30 mg vitamin E) or a placebo daily for 5 years. Of them, 330 had follow-up colonoscopy (164 in the intervention and 166 in the placebo group). After a median follow-up of 4 years (range 1-15 years), 100 patients had recurrence: 38 in the intervention and 62 in the placebo arm. The 15-year cumulative incidence of recurrence was 48.3 % in the intervention and 64.5 % in the placebo arm (HR = 0.59; log-rank P = 0.009). A 39 % reduction of the risk of recurrence was observed in the intervention compared to the placebo group (adjusted HR = 0.61; 95 % CI 0.41-0.92): the risk reduction was similar for small tubular (adjusted HR = 0.61; 95 % CI 0.37-0.99) and advanced adenomas (adjusted HR = 0.50; 95 % CI 0.24-1.01). Our study showed a statistically significant effect of antioxidant supplementation on adenoma recurrence."

According to the news reporters, the research concluded: "Further clinical trials are needed to address the role of antioxidants in subgroups of subjects at increased risk for colorectal cancer."

For more information on this research see: Antioxidant supplement and long-term reduction of recurrent adenomas of the large bowel. A double-blind randomized trial. Journal of Gastroenterology, 2013;48(6):698-705. Journal of Gastroenterology can be contacted at: Springer Japan Kk, Chiyoda First Bldg East, 3-8-1 Nishi-Kanda, Chiyoda-Ku, Tokyo, 101-0065, Japan. (Springer -; Journal of Gastroenterology -

Our news journalists report that additional information may be obtained by contacting L. Bonelli, IRCCS AOU San Martino IST, Clin Epidemiol Unit, Genoa, Italy (see also Colorectal Cancer).

Keywords for this news article include: Antioxidants, Genoa, Italy, Europe, Oncology, Gastroenterology, Colorectal Cancer, Protective Agents, Risk and Prevention, Clinical Trials and Studies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC

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