Study type: Epidemiological study (observational study)

Handheld cellular telephones and risk of acoustic neuroma. epidem.

Published in: Neurology 2002; 58 (8): 1304-1306

Aim of study (acc. to author)

A hospital-based case-control study of acoustic neuromas and the usage of handheld cellular phones was conducted in the USA.

Further details

Usage of a cellular phone on a regular basis was defined as having a subscription to a cellular phone service.

Endpoint/type of risk estimation

Type of risk estimation: (odds ratio (OR))

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 cell phone use: 0 years
Group 2 cell phone use: 1-2 years
Group 3 cell phone use: 3-6 years
Reference group 4 cell phone use: 0 hours/month
Group 5 cell phone use: 1-2.5 hours/month
Group 6 cell phone use: > 2.5 hours/month
Reference group 7 total hours of use: 0
Group 8 total hours of use: 1-60
Group 9 total hours of use: > 60
Group 10 cell phone handedness left - tumor laterality left
Group 11 cell phone handedness left - tumor laterality right
Group 12 cell phone handedness right- tumor laterality left
Group 13 cell phone handedness right - tumor laterality right

Population

Case group

Control group

Study size

Cases Controls
Eligible 90 86
Participants 90 86
Evaluable 90 86
Statistical analysis method: (adjustment: )

Conclusion (acc. to author)

18 cases (20%) and 23 controls (26,7%) reported regular use of handheld cellular telephones.
The risk of acoustic neuroma was not associated with use of cellular telephones. The tumor more often occurred on the contralateral than ipsilateral side of the head.

Limitations (acc. to author)

No conclusions can be drawn for long-term users, since the study was conducted about 10 years after introduction of cellular telephone technology.

Study funded by

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