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Epidemiological Study (meta-analysis)

Meta-analysis of long-term mobile phone use and the association with brain tumours. epidemiol.

By: Hardell L, Carlberg M, Söderqvist F, Hansson Mild K
Published in: Int J Oncol 2008; 32 (5): 1097 - 1103 (PubMed | Journal website)

Aim of study (according to author)
A meta-analysis was conducted in the Sweden to evaluate long-term mobile phone use and the association with brain tumours. Following studies published between 2001 and 2007 were included: Inskip et al. 2001, Auvinen et al. 2002, Lönn et al. 2004, Christensen et al. 2004, Schoemaker et al. 2005, Lönn et al. 2005, Christensen et al. 2005, Hepworth et al. 2006, Schüz et al. 2006, Hardell et al. 2006, Takebayashi et al. 2006, Lahkola et al. 2007, Hours et al. 2007, Schlehofer et al. 2007, and Klaeboe et al. 2007.
Background/further details:
The analyses were separately performed for the brain tumor types glioma, acoustic neuroma and meningioma and for the both types of exposure "regular use of mobile phones" and "use for more than 10 years".

Endpoint/type of risk estimation

Estimate of incidence by odds ratio (OR)

Exposure

groups of exposure:

Reference group 1:  not exposed 
group 2:  regular mobile phone use  
group 3:  regular mobile phone use: > 10 years 

Population
Study group: men and women
Study location: Sweden, Finland, Norway, Denmark, Germany, France, UK, USA, Japan

Statistical analysis using random effects model

Results/conclusion (according to author)
The results showed overall no significantly increased risk for regular mobile phone use and brain tumours. Ipsilateral (on the same side) use for more than 10 years showed a significantly increased risk for glioma (OR 2.0, CI 1.2-3.4) and acoustic neuroma (OR 2.4, CI 1.2-5.3).
The authors concluded that the meta-analysis gave a consistent pattern of association between mobile phone use for more than 10 years and ipsilateral glioma and acoustic neuroma.

Limitations (according to author): The results for mobile phone use for more than 10 years are based on low numbers.

(Study character: epidemiological study, meta-analysis)

Study funded by

Related articles i
Glossary: acoustic neuroma, analog, brain, brain tumor, CI, digital, epidemiological, exposure, glioma, GSM, incidence, ipsilateral, meningioma, meta-analysis, mobile communication, mobile phone, NMT, OR, questionnaire, risk, significantly, statistical, tumours
Exposure: mobile communication system, analog mobile phone, digital mobile phone, GSM, NMT, personal exposure

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