RT Journal Article SR Electronic T1 Risk of brain tumours in relation to estimated RF dose from mobile phones: results from five Interphone countries JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 631 OP 640 DO 10.1136/oemed-2011-100155 VO 68 IS 9 A1 Cardis, E A1 Armstrong, B K A1 Bowman, J D A1 Giles, G G A1 Hours, M A1 Krewski, D A1 McBride, M A1 Parent, M E A1 Sadetzki, S A1 Woodward, A A1 Brown, J A1 Chetrit, A A1 Figuerola, J A1 Hoffmann, C A1 Jarus-Hakak, A A1 Montestruq, L A1 Nadon, L A1 Richardson, L A1 Villegas, R A1 Vrijheid, M YR 2011 UL http://oem.bmj.com/content/68/9/631.abstract AB Objectives The objective of this study was to examine the associations of brain tumours with radio frequency (RF) fields from mobile phones.Methods Patients with brain tumour from the Australian, Canadian, French, Israeli and New Zealand components of the Interphone Study, whose tumours were localised by neuroradiologists, were analysed. Controls were matched on age, sex and region and allocated the ‘tumour location’ of their matched case. Analyses included 553 glioma and 676 meningioma cases and 1762 and 1911 controls, respectively. RF dose was estimated as total cumulative specific energy (TCSE; J/kg) absorbed at the tumour's estimated centre taking into account multiple RF exposure determinants.Results ORs with ever having been a regular mobile phone user were 0.93 (95% CI 0.73 to 1.18) for glioma and 0.80 (95% CI 0.66 to 0.96) for meningioma. ORs for glioma were below 1 in the first four quintiles of TCSE but above 1 in the highest quintile, 1.35 (95% CI 0.96 to 1.90). The OR increased with increasing TCSE 7+ years before diagnosis (p-trend 0.01; OR 1.91, 95% CI 1.05 to 3.47 in the highest quintile). A complementary analysis in which 44 glioma and 135 meningioma cases in the most exposed area of the brain were compared with gliomas and meningiomas located elsewhere in the brain showed increased ORs for tumours in the most exposed part of the brain in those with 10+ years of mobile phone use (OR 2.80, 95% CI 1.13 to 6.94 for glioma). Patterns for meningioma were similar, but ORs were lower, many below 1.0.Conclusions There were suggestions of an increased risk of glioma in long-term mobile phone users with high RF exposure and of similar, but apparently much smaller, increases in meningioma risk. The uncertainty of these results requires that they be replicated before a causal interpretation can be made.