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Denmark participates with 14 other countries in an international case-control study of select cancers based on a common methodology. The first report is a nationwide, population-based study of patterns of cell phone use among 107 persons diagnosed with acoustic neuromas and 214 matched controls. A centralized registry and referral system indicated 141 cases of acoustic neuroma diagnosed in persons ages 20-69 years over a two-year period (2000-2002). Data were obtained from direct interviews (82% participation rate), medical record reviews and radiographic reports. No associations between cell phone use and acoustic neuromas were identified. Tumors did not occur more frequently on the side on which the phone was held. Use of a phone for ten years or longer did not increase the risk over shorter-term use. Tumor size was unrelated to any pattern (duration or frequency) of cell phone use.
(Christensen H et al. Am J Epidemiol 2004;159:277-283)
Comment: This study had rigor due to complete registries of diagnosed cases of the target condition and a population registry of all residents since 1968 that includes age and gender. We continue to need science to address fears and myths about dangers of technology; the safety risks with cell phones lies in when they are used. --J.O.
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