Morgan RW, Kelsh MA, Zhaok et al.

The authors studied cancer rates among employees of Motorola, a manufacturer of wireless communication products. They classified workers into high, moderate, low and background RF exposure groups. A total of 195,775 workers were included in the study, which covered the years 1976 - 1996. The rates for brain cancer and lymphomas/leukaemias were less than in the general population. (This is commonly the case when employed people are compared with the general population. It is thought that it may be because people who are employed tend to be healthier than those who are not). Comparisons within the various exposure groups did not show any evidence of increased rates with high exposure, nor was there any association between rates and increased duration of exposure. The authors point out that their findings are limited by an imprecise classification of exposure and by the fact that their subjects were relatively young (and therefore less likely to develop cancer).



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