Primary brain tumors and mobile cell phone usage

Subsequent good quality studies have strengthened, not weakened this observation, with one showing an odds ratio for glioma increased to 3.0 (CI 1.7-5.2) in the>25year latency group [4]; the French CERENAT collaborative case-control study demonstrating an odds ratio for glioma of 2.89 (CI 1.41-5.93) in the heaviest users (>896h) [5], and a third demonstrating significantly poorer outcome in patients with Astrocytoma grade IV (Glioblastoma Multiforme=GBM), in heavy compared with light cell phone users, when the latency was longer (>20years), and particularly when first cell phone usage was before the age of 20 years [6].