Meta-Study on Phone-Cancer Studies Shows Bias WASHINGTON
(Reuters) - Studies on whether mobile phones can cause cancer,
especially brain tumors, vary widely in quality and there may be
some bias in those showing the least risk, researchers reported
on Tuesday. So far it is difficult to demonstrate any link,
although the best studies do suggest some association between
mobile phone use and cancer, the team led by Dr. Seung-Kwon
Myung of South Korea's National Cancer Center found. Myung and
colleagues at Ewha Womans University and Seoul National
University Hospital in Seoul and the University of California,
Berkeley, examined 23 published studies of more than 37,000
people in what is called a meta-analysis. They found results
often depended on who conducted the study and how well they
controlled for bias and other errors. "We found a large
discrepancy in the association between mobile phone use and
tumor risk by research group, which is confounded with the
methodological quality of the research," they wrote in