She cites the study's two little-noticed appendices that reveal an 84-percent increased risk of meningiomas for those who used digital phones for 1,640 hours or more and a 343-percent increased risk for those used both digital and analogue cellphones or if the type of phone used was unknown. As well, the study found those who used a cellphone for two to four years had a 68-percent increased risk of developing gliomas versus those who had used a cellphone for under two years. As well, there was an 118-percent increased risk for those who used a cellphone for 10 or more years.
These findings occurred, Havas writes, despite the fact that the study's methodology was biased to minimize any adverse effects from cell use. See here for the full Interphone study. (Click Supplementary Data for the two appendices that Havas cites.) The study was produced by the World Health Organization's International Agency for Research on Cancer with funds from cellphone makers.
For more info, see this GQ investigation of various scientific studies showing other health impacts from cellphone use and how government regulators have so far shielded cellphone makers, refusing to fund independent research into health impacts or to protect the public.