Study participants in the group with cancer averaged 2.5 hours of phone use per month, while the control group averaged 2.2 hours per month. Except for preliminary results from a Swedish study, which also found no risk from the phones, there have been no studies on how cellphones affect humans, Muscat says. These claims cannot be strongly supported or refuted because of the relative paucity of scientific data on this topic. The latest study, conducted at five medical centers between 1994 and 1998, found no increased cancer risk, even among people who used the phones for one hour a day or longer, Muscat says. The technology is moving much faster than the health research, so we're always one step behind.
Muscat says studies are underway in Europe to investigate the possible risks of digital cellphones.
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