Ownership and use of wireless telephones: a population-based study of Swedish children aged 7–14 years

Söderqvist, Fredrik; Hardell, Lennart; Carlberg, Michael; Mild, Kjell Hansson

doi:10.1186/1471-2458-7-105

Cited by 78 publications

(70 citation statements)

References 10 publications

(13 reference statements)

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“…By the age of 13, most of our sample had used a mobile phone, which is comparable to Swedish data [Soderqvist et al, 2007]. We found that students who reported making or receiving more voice or SMS calls per week, and in particular more of both, demonstrated shorter response times on learning tasks, but less accurate working memory.…”

Section: Discussionsupporting

confidence: 79%

Mobile telephone use is associated with changes in cognitive function in young adolescents

Abramson

Benke

Dimitriadis

et al. 2009

Bioelectromagnetics

122

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As part of the Mobile Radiofrequency Phone Exposed Users' Study (MoRPhEUS), a cross-sectional epidemiological study examined cognitive function in secondary school students. We recruited 317, 7th grade students (144 boys, 173 girls, median age 13 years) from 20 schools around Melbourne, Australia. Participants completed an exposure questionnaire based on the Interphone study, a computerised cognitive test battery, and the Stroop colour-word test. The principal exposure metric was the total number of reported mobile phone voice calls per week. Linear regression models were fitted to cognitive test response times and accuracies. Age, gender, ethnicity, socio-economic status and handedness were fitted as covariates and standard errors were adjusted for clustering by school. The accuracy of working memory was poorer, reaction time for a simple learning task shorter, associative learning response time shorter and accuracy poorer in children reporting more mobile phone voice calls. There were no significant relationships between exposure and signal detection, movement monitoring or estimation. The completion time for Stroop word naming tasks was longer for those reporting more mobile phone voice calls. The findings were similar for total short message service (SMS, also known as text) messages per week, suggesting these cognitive changes were unlikely due to radiofrequency (RF) exposure. Overall, mobile phone use was associated with faster and less accurate responding to higher level cognitive tasks. These behaviours may have been learned through frequent use of a mobile phone.

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Section: Discussionsupporting

confidence: 79%

Mobile telephone use is associated with changes in cognitive function in young adolescents

Abramson

Benke

Dimitriadis

et al. 2009

Bioelectromagnetics

122

View full text Add to dashboard Cite

show abstract

“…However, given that these pervious papers were written when mobile phone technology was fairly new to the society, it would not be fully appropriate to apply such suggestions to the current findings because mobile phones are very commonly used throughout the society today. Females generally spent more time on their mobile phones than males over all age groups, with a greater number of calls per day and a longer average time per call, which are consistent with results from previous studies [7,9,13,14]. These results may corroborate the possible existence of traditional gender role within the mobile culture, with females showing more interest towards the interactive side of communication technology, rather than the innovative counterparts [10].…”

Section: Discussionsupporting

confidence: 89%

Epidemiological Characteristics of Mobile Phone Ownership and Use in Korean Children and Adolescents

Byun

Kwon

et al. 2013

Environ Health Toxicol

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“…Taking the still relatively short time for use of wireless phones on a broad scale (30,31) the results showing increasing brain tumour incidence may be early warning of future public health problems, especially considering the large deficit in the Swedish Cancer Registry. It is striking that during 2000-2007 the incidence of nervous system tumours increased significantly in the Gothenburg medical region, which seems to have better reporting than other medical regions in Sweden.…”

Section: Ci) --------------------------------------------------------mentioning

confidence: 99%

Mobile phones, cordless phones and the risk for brain tumours

Hardell

Carlberg²

2009

Int J Oncol

144

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Abstract. The Hardell-group conducted during 1997-2003 two case control studies on brain tumours including assessment of use of mobile phones and cordless phones. The questionnaire was answered by 905 (90%) cases with malignant brain tumours, 1,254 (88%) cases with benign tumours and 2,162 (89%) population-based controls. Cases were reported from the Swedish Cancer Registries. Anatomical area in the brain for the tumour was assessed and related to side of the head used for both types of wireless phones. In the current analysis we defined ipsilateral use (same side as the tumour) as ≥50% of the use and contralateral use (opposite side) as <50% of the calling time. We report now further results for use of mobile and cordless phones. Regarding astrocytoma we found highest risk for ipsilateral mobile phone use in the >10 year latency group, OR=3.3, 95% CI=2.0-5.4 and for cordless phone use OR=5.0, 95% CI=2.3-11. In total, the risk was highest for cases with first use <20 years age, for mobile phone OR=5.2, 95% CI=2.2-12 and for cordless phone OR=4.4, 95% CI=1.9-10. For acoustic neuroma, the highest OR was found for ipsilateral use and >10 year latency, for mobile phone OR=3.0, 95% CI=1.4-6.2 and cordless phone OR=2.3, 95% CI=0.6-8.8. Overall highest OR for mobile phone use was found in subjects with first use at age <20 years, OR=5.0, 95% CI 1.5-16 whereas no association was found for cordless phone in that group, but based on only one exposed case. The annual age-adjusted incidence of astrocytoma for the age group >19 years increased significantly by +2.16%, 95% CI +0.25 to +4.10 during [2000][2001][2002][2003][2004][2005][2006][2007] in Sweden in spite of seemingly underreporting of cases to the Swedish Cancer Registry. A decreasing incidence was found for acoustic neuroma during the same period. However, the medical diagnosis and treatment of this tumour type has changed during recent years and underreporting from a single center would have a large impact for such a rare tumour.

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Ownership and use of wireless telephones: a population-based study of Swedish children aged 7–14 years

Cited by 78 publications

References 10 publications

Mobile telephone use is associated with changes in cognitive function in young adolescents

Mobile telephone use is associated with changes in cognitive function in young adolescents

Epidemiological Characteristics of Mobile Phone Ownership and Use in Korean Children and Adolescents

Mobile phones, cordless phones and the risk for brain tumours

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