Preventie: veel bellen, zowel gewoon als mobiel, geeft verhoogd risico op hersentumoren, vooral bij kinderen en jongeren bewijst nieuwe langjarige studie onder totaal 4400 deelnemers

3 april 2006: Bron: Arch Environ Health

Wie veel belt, totaal 2000 uur of elke dag minimaal een uur per dag en dat over een periode van 10 jaar heeft een vergrote kans op het krijgen van een hersentumor. Dit bewijst een nieuwe Zweedse langjarige prospectieve studie onder 2200 volwassen deelnemers in de leeftijd van 20 tot 80 jaar met een al ontwikkelde kankersoort en een controlegroep van 2200 'gezonde' deelnemers. Van de 2200 deelnemers die al een tumor hadden ontwikkeld bleken maar liefst 905 mensen een hersentumor te hebben. 1/3 van deze groep bleek heel veel en frequent te bellen in de tijd vooraf aan hun kanker. Weer 85 daarvan belden veel mobiel. De onderzoekers waarschuwen vooral kinderen en jongeren niet al teveel te bellen, zeker niet mobiel. Blijkbaar is dus bellen en de 'straling' die daarbij vrij komt toch schadelijk voor mensen. We heben een artikel over deze studie hier geplaatst en daaronder twee abstracten van studies naar het effect van bellen op hersentumoren.

LONDON: Using a cell phone for long periods could lead to malignant brain tumours, says a new study contradicting earlier findings which found no such link. Earlier studies did not find evidences that radiation from cell phones was linked with elevated brain tumour risk although the damaging effect of cell phone use has been suspected for long.

Those who used a cell phone for 2,000 hours or for one hour a day over a period of more than 10 years increase their risk of a malignant brain tumour on the side of the head, according to a new study published in the International Archives of Occupational and Environmental Health. Researchers led by Kjell Mild, of the Swedish National Institute for Working Life, compared cell phone use of 2,200 patients with malignant tumours and an equal number of healthy control cases.

Among the tumour patients (aged 20 to 80), 905 had a malignant brain tumour and one third of them were heavy users of cell phones, it said. "Of these 905 cases, 85 were high users of mobile phones," the study authors said.

Children should avoid using cell phones whenever possible because they are most vulnerable to tumour risk than adults, the study warned.

Arch Environ Health. 2004 Mar;59(3):132-7.

Cellular and cordless telephone use and the association with brain tumors in different age groups.

Hardell L, Mild KH, Carlberg M, Hallquist A.
Department of Oncology, University Hospital, Orebro, Sweden. lennart.hardell@orebroll.se The authors' case-control study on the possible association between brain tumors and mobile and cordless telephone use included 1,617 patients and 1,617 controls. A questionnaire was answered by 1,429 (88%) cases and 1,470 (91%) controls. Use of analog cellular telephones yielded an odds ratio (OR) for brain tumors of 1.31, 95% confidence interval (CI) = 1.04-1.64, increasing for ipsilateral use to OR = 1.65, 95% CI = 1.19-2.30. The authors found the highest risk for the 20-29-yr age group, with OR = 5.91, 95% CI = 0.63-55 for ipsilateral use of analog phones. The highest risks were associated with >5-year latency period in the 20-29-yr age group for analog phones (OR = 8.17, 95% CI = 0.94-71), and cordless phones (OR = 4.30, 95% CI = 1.22-15).

PMID: 16121902 [PubMed - indexed for MEDLINE]

Environ Res. 2006 Feb;100(2):232-41. Epub 2005 Jul 14.

Case-control study of the association between the use of cellular and cordless telephones and malignant brain tumors diagnosed during 2000-2003.

Hardell L, Carlberg M, Mild KH.
Department of Oncology, University Hospital, SE-701 85 Orebro, Sweden.

We performed a case-control study on the use of cellular and cordless telephones and the risk for brain tumors diagnosed during 2000-2003. We report the results for malignant brain tumors with data from 317 cases (88%) and 692 controls (84%). The use of analog cellular phones yielded odds ratio (OR) of 2.6 and a 95% confidence interval (CI) of 1.5-4.3, increasing to OR=3.5 and 95% CI=2.0-6.4 with a >10-year latency period. Regarding digital cellular telephones, the corresponding results were OR=1.9, 95% CI=1.3-2.7 and OR=3.6, 95% CI=1.7-7.5, respectively. Cordless telephones yielded OR=2.1, 95% CI=1.4-3.0, and with a >10-year latency period, OR=2.9, 95% CI=1.6-5.2. The OR increased with the cumulative number of hours of use and was highest for high-grade astrocytoma. A somewhat increased risk was also found for low-grade astrocytoma and other types of malignant brain tumors, although not significantly so. In multivariate analysis, all three phone types studied showed an increased risk.

PMID: 16023098 [PubMed - indexed for MEDLINE]

kinderen, jongeren, preventie, hersentumoren, mobiel bellen