Ownership and use of wireless telephones: a population-based study of Swedish children aged 7-14 years.
BACKGROUND
Recent years have seen a rapid increase in the use of mobile phones and other sources of microwave radiation, raising concerns about possible adverse health effects. As children have longer expected lifetime exposures to microwaves from these devices than adults, who started to use them later in life, they are a group of special interest.


METHODS
We performed a population-based study to assess ownership and use of mobile phones and cordless phones among children aged 7-14 years. A questionnaire comprising 24 questions was sent to 2000 persons selected from the Swedish population registry using a stratified sampling scheme.


RESULTS
The response rate was 71.2%. Overall, 79.1% of the respondents reported mobile phone access, and 26.7% of them talked for 2 minutes or more per day. Of those who reported mobile phone access, only 5.9% reported use of hands-free equipment. Use of cordless phones was reported by 83.8% of the respondents and 38.5% of them talked for 5 minutes or more per day. Girls generally reported more frequent use than boys.


CONCLUSIONS
This study showed that most children had access to and used mobile and cordless phones early in life and that there was a rapid increase in use with age. It also showed very low use of hands-free equipment among children with mobile phone access, and finally that girls talked significantly more minutes per day using mobile and cordless phones than boys did.
Söderqvist
Fredrik
F
Department of Oncology, University Hospital, Institute of Clinical Medicine Orebro University, Orebro, Sweden. fredrik.soderqvist@orebroll.se
Hardell
Lennart
L
Carlberg
Michael
M
Hansson Mild
Kjell
K
D000293:Adolescent; D000367:Age Factors; D040421:Cell Phone / Q000706:statistics & numerical data*; D002648:Child; D002669:Child Welfare; D016001:Confidence Intervals; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005260:Female; D006266:Health Education; D006801:Humans; D015994:Incidence; D008297:Male; D016017:Odds Ratio; D010067:Ownership / Q000706:statistics & numerical data*; D011159:Population Surveillance; D018570:Risk Assessment; D012737:Sex Factors; D011795:Surveys and Questionnaires; D013548:Sweden; D013997:Time Factors