Study type: Epidemiological study (observational study)

Mobile phone use and location of glioma: a case-case analysis. epidem.

Published in: Bioelectromagnetics 2009; 30 (3): 176-182

Aim of study (acc. to author)

A case-case analysis was conducted in Finland to evaluate the association between mobile phone use and the risk of glioma located in the area of the brain likely to receive most of the emitted radiofrequency energy.

Further details

The study sample represents a subset of the Finnish Interphone study. The shortest distance from the midpoint of the tumor to the assumed location of the mobile phone was calculated for each subject. The index group comprised cases with a distance of 4.6 cm or less and the reference group with a distance of more than 4.6 cm.

Endpoint/type of risk estimation

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 never/non-regular use
Group 2 regular use
Reference group 3 cumulative call time: never/non-regular use
Group 4 cumulative call time: 2 - 539 h
Group 5 cumulative call time: > 540 h
Reference group 6 laterality of use: never/non-regular use
Group 7 laterality of use: ipsilateral
Group 8 laterality of use: contralateral
Reference group 9 duration of use: never/non-regular use
Group 10 duration of use: 0.5 - 5 years
Group 11 duration of use: > 5 years

Population

Study size

Type Value
Total 144
Participants 113
Participation rate 78 %
Evaluable 99
Statistical analysis method: ( adjustment: )

Conclusion (acc. to author)

21 cases (22 %) were never or non-regular users. The percentage of cases with a distance of less than 4.6 cm between the tumor midpoint and the presumed location of the mobile phone was slightly higher among regular users than never and non-regular users. Non-significantly elevated odds ratios were observed for several indicators of mobile phone use, but without an exposure gradient. Significantly increased odds ratios were found for contralateral and short-term use.
The authors concluded that the results overall did not indicate an association between mobile phone use and the risk of glioma located in the most heavily exposed part of the brain.

Limitations (acc. to author)

The results are based on low numbers.

Study funded by

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