Study type: Epidemiological study (observational study)

Case-Control Study on Cellular and Cordless Telephones and the Risk for Acoustic Neuroma or Meningioma in Patients Diagnosed 2000-2003. epidem.

Published in: Neuroepidemiology 2005; 25 (3): 120-128

Aim of study (acc. to author)

A case-control study on the use of cellular and cordless telephones and the risk for brain tumors was conducted in Sweden.

Further details

This study reports results for benign brain tumors, mainly meningioma and acoustic neuroma, whereas the results for malignant brain tumors are presented in publication 12259.
Subjects who started their use of a mobile or cordless phone within one year prior diagnosis were classified as unexposed.

Endpoint/type of risk estimation

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

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 unexposed
Group 2 analogue > 1- to 5-year latency period
Group 3 analogue > 5- to 10-year latency period
Group 4 analogue > 10-year latency period
Group 5 analogue total, > 1-year latency period
Group 6 analogue ≤ 80 h, > 1- to 5-year latency period
Group 7 analogue ≤ 80 h, > 5- to 10-year latency period
Group 8 analogue ≤ 80 h, > 10-year latency period
Group 9 analogue ≤ 80 h, total, > 1-year latency period
Group 10 analogue > 80 h, > 1- to 5-year latency period
Group 11 analogue > 80 h, > 5- to 10-year latency period
Group 12 analogue > 80 h, > 10-year latency period
Group 13 analogue > 80 h, total, > 1-year latency period
Group 14 digital > 1- to 5-year latency period
Group 15 digital > 5- to 10-year latency period
Group 16 digital > 10-year latency period
Group 17 digital total, > 1-year latency period
Group 18 digital ≤ 64 h, > 1- to 5-year latency period
Group 19 digital ≤ 64 h, > 5- to 10-year latency period
Group 20 digital ≤ 64 h, > 10-year latency period
Group 21 digital ≤ 64 h, total, > 1-year latency period
Group 22 digital > 64 h, > 1- to 5-year latency period
Group 23 digital > 64 h, > 5- to 10-year latency period
Group 24 digital > 64 h, > 10-year latency period
Group 25 digital > 64 h, total, > 1-year latency period
Group 26 cordless > 1- to 5-year latency period
Group 27 cordless > 5- to 10-year latency period
Group 28 cordless > 10-year latency period
Group 29 cordless total, > 1-year latency period
Group 30 cordless ≤ 243 h, > 1- to 5-year latency period
Group 31 cordless ≤ 243 h, > 5- to 10-year latency period
Group 32 cordless ≤ 243 h, > 10-year latency period
Group 33 cordless ≤ 243 h, total, > 1-year latency period
Group 34 cordless > 243 h, > 1- to 5-year latency period
Group 35 cordless > 243 h, > 5- to 10-year latency period
Group 36 cordless > 243 h, > 10-year latency period
Group 37 cordless > 243 h, > 10-year latency period

Population

Case group

Control group

Study size

Cases Controls
Eligible 462 820
Participants 413 692
Participation rate 89 % 84 %
Statistical analysis method: (adjustment: )

Conclusion (acc. to author)

No use of cellular or cordless telephone was reported by 123 cases (29.8%) and 233 controls (33.7%).
An increased risk for acoustic neuroma and the use of analogue cellular phones was found. Regarding meningioma, the risk was slightly increased but based on low numbers.

Study funded by

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