Hardell L, Mild KH, Carlberg M, Söderqvist F.

Tumour risk associated with use of cellular telephones or cordless desktop telephones.
World J Surg Oncol. 2006 Oct 11;4:74.

http://www.ncbi.nlm.nih.gov/pubmed/17034627

Hardell L, Mild KH, Carlberg M, Söderqvist F.
Department of Oncology, University Hospital, SE-701 85 Orebro, Sweden. lennart.hardell@orebroll.se
Handy

Abstract
BACKGROUND: The use of cellular and cordless telephones has increased dramatically during the last decade. There is concern of health problems such as malignant diseases due to microwave exposure during the use of these devices. The brain is the main target organ. METHODS: Since the second part of the 1990's we have performed six case-control studies on this topic encompassing use of both cellular and cordless phones as well as other exposures. Three of the studies concerned brain tumours, one salivary gland tumours, one non-Hodgkin lymphoma (NHL) and one testicular cancer. Exposure was assessed by self-administered questionnaires. RESULTS: Regarding acoustic neuroma analogue cellular phones yielded odds ratio (OR) = 2.9, 95 % confidence interval (CI) = 2.0-4.3, digital cellular phones OR = 1.5, 95 % CI = 1.1-2.1 and cordless phones OR = 1.5, 95 % CI = 1.04-2.0. The corresponding results were for astrocytoma grade III-IV OR = 1.7, 95 % CI = 1.3-2.3; OR = 1.5, 95 % CI = 1.2-1.9 and OR = 1.5, 95 % CI = 1.1-1.9, respectively. The ORs increased with latency period with highest estimates using > 10 years time period from first use of these phone types. Lower ORs were calculated for astrocytoma grade I-II. No association was found with salivary gland tumours, NHL or testicular cancer although an association with NHL of T-cell type could not be ruled out. CONCLUSION: We found for all studied phone types an increased risk for brain tumours, mainly acoustic neuroma and malignant brain tumours. OR increased with latency period, especially for astrocytoma grade III-IV. No consistent pattern of an increased risk was found for salivary gland tumours, NHL, or testicular cancer.

Comment
This publication had been excluded in the Interphone report 2010 with reference to the review of Ahlbom et al 2009, although this review did not find any fault in Hardell’s research.
Ahlbom A, Feychting M, Green A et al. Epidemiologic evidence on mobile phones and tumor risk: a review. Epidemiology 2009;20:639–52
The comment by one of the leading Epidemiologists, Kenneth Rothman, in 2009 to this publication is: “Ahlbom et al identified no single methodologic problem that could explain the difference between the studies by Hardell and the results from the other studies. In their words, “. . . the series of decisions in methods, analysis, and presentation provide the most plausible explanation for the deviation of the findings of the Hardell studies from those of other investigators.” ”

Found in http://journals.lww.com/epidem/toc/2009/09000

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