Use of cellular or cordless telephones and the risk for non-Hodgkin’s lymphoma
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Objectives: To evaluate the use of cellular and cordless telephones as the risk factor for non-Hodgkin’s lymphoma (NHL). Methods: Male and female subjects aged 18–74 years living in Sweden were included during a period from 1 December 1999 to 30 April 2002. Controls were selected from the national population registry. Exposure to different agents was assessed by questionnaire. Results: In total, 910 (91%) cases and 1016 (92%) controls participated. NHL of the B-cell type was not associated with the use of cellular or cordless telephones. Regarding T-cell NHL and >5 year latency period, the use of analogue cellular phones yielded: odds ratio (OR) = 1.46, 95%; confidence interval (CI) = 0.58–3.70, digital: OR=1.92, 95%; CI=0.77–4.80 and cordless phones: OR=2.47; CI=1.09–5.60. The corresponding results for certain, e.g. cutaneous and leukaemia, T-cell lymphoma for analogue phones were: OR=3.41, 95%; CI=0.78–15.0, digital: OR=6.12, 95%; CI=1.26–29.7 and cordless phones: OR=5.48, 95%; CI=1.26–23.9. Conclusions: The results indicate an association between T-cell NHL and the use of cellular and cordless telephones, however based on low numbers and must be interpreted with caution. Regarding B-cell NHL no association was found.
KeywordsT-cell B-cell lymphoma Microwaves Risk factors Cellular Cordless phones
Supported by grant no 2001–0224 from FAS, Cancer-och Allergifonden, Nyckelfonden, Örebro University Hospital Cancer Fund. Ms Iréne Larsson participated in the data collection and Matz Eriksson performed interviews. We thank cytologist Edneia Tani and pathologists Måns Åkerman, Göran Roos, Anna Porwit-MacDonald and Åke Öst for extensive review of the tumour material.
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