Study reveals inaccuracies in studies of cancer treatment

Certain biases may exist in observational studies that compare outcomes of different cancer therapies, making the results questionable. That is the conclusion of a new study published in the June 1, 2008 issue of CANCER, a peer-reviewed journal of the American Cancer Society. The research suggests that observational studies should include more thorough information and should be better designed to minimize inaccuracies.