Risks of the cell phones on brain cancer: a rather reassuring study
The number of brain cancers in four Nordic countries has not increased with the arrival of the mobile.
While the battle is in full swing on the possible risks of relay antennas, contested by many scientists, but put forward by some associations, the debate on the dangers of the mobile phone, muted, risks being revived with the Expected publication for the end of the year of the large international study Interphone conducted under the aegis of 37 scientists in 13 countries.
In the meantime, another smaller survey has been published in the Journal of the National Cancer Institute, analyzing the evolution of brain tumors between 1974 and 2003 in Denmark, Finland, Norway and Norway. Sweden. The aim is to check whether the introduction of the mobile phone in the early 1990s was accompanied by an increase in brain tumors. Clearly examine the evolution curves of the number of brain cancers to see if there was a "break" coinciding with the appearance of mobile.
The results are rather reassuring. Using cancer registries from these four countries, the researchers looked at 59,984 men and women aged 20 to 79 who had glioma or meningioma, the two major brain tumors, during thirty years of surveillance. The results show that between 1974 and 2003, the number of new cases of glioma increased by 0.5% per year in men and by 0.2% in women. For meningioma, growth was 0.8% for men and 3.8% for women in the early 1990s. This steady increase is due to several factors. In the mid-1970s, the advent of scanners revolutionized the diagnosis of brain tumors, as did the arrival in the mid-1980s of nuclear magnetic resonance imaging. In addition, the increase in life expectancy in all Western European countries has contributed to the rise in the number of all cancers.
The authors conclude: "We did not detect any clear change in the number of brain cancers between 1998 and 2003. This number was either stable in some age groups, slightly decreasing in others, or continuing to decline. increase, with an increase that began well before the introduction of mobile. We did not find an increase in brain cancers related to mobile phones. "
The preliminary results of Interphone go in the same direction, with a gray area for heavy users. The authors believe that a risk can not be totally eliminated, either because it is too weak to be detected with the current epidemiological tools, or because the decline is insufficient. Finally, this study did not examine the case of children, major users of laptops for which the greatest caution is recommended.