Study type: Epidemiological study (observational study)

Cellular and cordless telephone use and the association with brain tumors in different age groups. epidem.

Published in: Arch Environ Health 2004; 59 (3): 132-137

Aim of study (acc. to author)

In this study, further analyses on the database of a Swedish case-control study (see publication 9105) were performed on the use of cellular telephones and cordless telephones and the risk of brain tumors.

Further details

Furthermore, there are additional analyses of the database of the same case-control study (publication 9105) in publications 9520, 9361 and 11953.
Subjects who started their use of a mobile phone 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 analog, all ages, > 1 year latency
Group 3 analog, 20 - 29 years old, > 1 year latency
Group 4 analog, 30 - 39 years old, > 1 year latency
Group 5 analog, 40 - 49 years old, > 1 year latency
Group 6 analog, 50 - 59 years old, > 1 year latency
Group 7 analog, 60 - 69 years old, > 1 year latency
Group 8 analog, 70 - 80 years old, > 1 year latency
Group 9 analog, all ages, > 5 years latency
Group 10 analog, 20 - 29 years old, > 5 years latency
Group 11 analog, 30 - 39 years old, > 5 years latency
Group 12 analog, 40 - 49 years old, > 5 years latency
Group 13 analog, 50 - 59 years old, > 5 years latency
Group 14 analog, 60 - 69 years old, > 5 years latency
Group 15 analog, 70 - 80 years old, > 5 years latency
Group 16 analog, all ages, > 10 years latency
Group 17 analog, 20 - 29 years old, > 10 years latency
Group 18 analog, 30 - 39 years old, > 10 years latency
Group 19 analog, 40 - 49 years old, > 10 years latency
Group 20 analog, 50 - 59 years old, > 10 years latency
Group 21 analog, 60 - 69 years old, > 10 years latency
Group 22 analog, 70 - 80 years old, > 10 years latency
Group 23 digital, all ages, > 1 year latency
Group 24 digital, 20 - 29 years old, > 1 year latency
Group 25 digital, 30 - 39 years old, > 1 year latency
Group 26 digital, 40 - 49 years old, > 1 year latency
Group 27 digital, 50 - 59 years old, > 1 year latency
Group 28 digital, 60 - 69 years old, > 1 year latency
Group 29 digital, 70 - 80 years old, > 1 year latency
Group 30 digital, all ages, > 5 years latency
Group 31 digital, 20 - 29 years old, > 5 years latency
Group 32 digital, 30 - 39 years old, > 5 years latency
Group 33 digital, 40 - 49 years old, > 5 years latency
Group 34 digital, 50 - 59 years old, > 5 years latency
Group 35 digital, 60 - 69 years old, > 5 years latency
Group 36 digital, 70 - 80 years old, > 5 years latency
Group 37 cordless, all ages, > 1 year latency
Group 38 cordless, 20 - 29 years old, > 1 year latency
Group 39 cordless, 30 - 39 years old, > 1 year latency
Group 40 cordless, 40 - 49 years old, > 1 year latency
Group 41 cordless, 50 - 59 years old, > 1 year latency
Group 42 cordless, 60 - 69 years old, > 1 year latency
Group 43 cordless, 70 - 80 years old, > 1 year latency
Group 44 cordless, all ages, > 5 years latency
Group 45 cordless, 20 - 29 years old, > 5 years latency
Group 46 cordless, 30 - 39 years old, > 5 years latency
Group 47 cordless, 40 - 49 years old, > 5 years latency
Group 48 cordless, 50 - 59 years old, > 5 years latency
Group 49 cordless, 60 - 69 years old, > 5 years latency
Group 50 cordless, 70 - 80 years old, > 5 years latency
Group 51 cordless, all ages, > 10 years latency
Group 52 cordless, 20 - 29 years old, > 10 years latency
Group 53 cordless, 30 - 39 years old, > 10 years latency
Group 54 cordless, 40 - 49 years old, > 10 years latency
Group 55 cordless, 50 - 59 years old, > 10 years latency
Group 56 cordless, 60 - 69 years old, > 10 years latency
Group 57 cordless, 70 - 80 years old, > 10 years latency
Group 58 analog, all ages, ipsilateral
Group 59 analog, all ages, contralateral
Group 60 analog, all ages, ipsi/contralateral
Group 61 digital, all ages, ipsilateral
Group 62 digital, all ages, contralateral
Group 63 digital, all ages, ipsi/contralateral
Group 64 cordless, all ages, ipsilateral
Group 65 cordless, all ages, contralateral
Group 66 cordless, all ages, ipsi/contralateral

Population

Case group

Control group

Study size

Cases Controls
Eligible 1,617 1,617
Participants 1,429 1,470
Participation rate 88 % 91 %
Statistical analysis method: (adjustment: )

Conclusion (acc. to author)

A statistically significant increased risk for brain tumors among users of analog cellular telephones, especially for ipsilateral use. For cordless phones a statistically significant increased risk for brain tumor was observed in 20-29-years age group.

Limitations (acc. to author)

The results for more than 10-years latency period are based on low numbers.

Study funded by

Related articles