Study type: Epidemiological study (observational study)

Symptoms experienced in connection with mobile phone use. epidem.

Published in: Occup Med (Lond) 2000; 50 (4): 237-245

Aim of study (acc. to author)

A cross-sectional study was conducted in Sweden and Norway to evaluate self-reported symptoms among mobile phone users in their jobs. The present publication includes the measures taken to reduce the experienced symptoms, conditions under which the symptoms were experienced and consequences with respect to medical consultations and sick leave.

Further details

The first part of the study comparing symptoms experienced by users of analog and digital mobile phones was published in Sandström et al. (2001).

Endpoint/type of risk estimation

Type of risk estimation:

Exposure

Assessment

Exposure groups

Group Description
Group 1 NMT users
Group 2 GSM users
Group 3 NMT and GSM users
Group 4 number of calls/day: < 2
Group 5 number of calls/day: 2 - 4
Group 6 number of calls/day: > 4
Group 7 calling time per day: < 2 min
Group 8 calling time per day: 2 - 15 min
Group 9 calling time per day: 15 - 60 min
Group 10 calling time per day: > 60 min

Population

Study size

Type Value
Total 16,990
Participants 10,631
Other:

exact numbers and observation period in Sandström et al. (2001)

Statistical analysis method:

Conclusion (acc. to author)

Overall, 31 % of Norwegian respondents and 13 % of Swedish respondents had experienced at least one symptom in connection with mobile phone use, mainly warmth on the ear, burning sensations in facial skin, and headaches. Relatively few had consulted a physician or been on sick leave because of the symptoms but about 45 % had taken steps to reduce the mobile phone attributed symptoms, mainly in reducing the calling time and using hands-free equipment.
The authors concluded that the results suggest an awareness of the mobile phone attributed symptoms, but not necessarily a serious health problem.

Study funded by

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