Abstract:
BACKGROUND:Mobile phone use and exposure to radiofrequency electromagnetic fields (RF-EMF) from it have been associated with symptoms in some studies, but the studies have shortcomings and their findings are inconsistent. We conducted a prospective cohort study to assess the association between amount of mobile phone use at baseline and frequency of headache, tinnitus or hearing loss at 4-year follow-up. METHODS:The participants had mobile phone subscriptions with major mobile phone network operators in Sweden (n = 21 049) and Finland (n = 3120), gave consent for obtaining their mobile phone call data from operator records at baseline, and filled in both baseline and follow-up questionnaires on symptoms, potential confounders and further characteristics of their mobile phone use. RESULTS:The participants with the highest decile of recorded call-time (average call-time >276 min per week) at baseline showed a weak, suggestive increased frequency of weekly headaches at 4-year follow-up (adjusted odds ratio 1.13, 95% confidence interval 0.95-1.34). There was no obvious gradient of weekly headache with increasing call-time (P trend 0.06). The association of headache with call-time was stronger for the Universal Mobile Telecommunications System (UMTS) network than older Global System for Mobile Telecommunications (GSM) technology, despite the latter involving higher exposure to RF-EMF. Tinnitus and hearing loss showed no association with call-time. CONCLUSIONS:People using mobile phones most extensively for making or receiving calls at baseline reported weekly headaches slightly more frequently at follow-up than other users, but this finding largely disappeared after adjustment for confounders and was not related to call-time in GSM with higher RF-EMF exposure. Tinnitus and hearing loss were not associated with amount of call-time.
journal_name
Int J Epidemioljournal_title
International journal of epidemiologyauthors
Auvinen A,Feychting M,Ahlbom A,Hillert L,Elliott P,Schüz J,Kromhout H,Toledano MB,Johansen C,Poulsen AH,Vermeulen R,Heinävaara S,Kojo K,Tettamanti G,COSMOS Study Group.doi
10.1093/ije/dyz127subject
Has Abstractpub_date
2019-10-01 00:00:00pages
1567-1579issue
5eissn
0300-5771issn
1464-3685pii
5532178journal_volume
48pub_type
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