Study type:
Epidemiological study
(observational study)
Brain tumors and salivary gland cancers among cellular telephone users
epidem.
By:
Auvinen A, Hietanen M, Luukkonen R, Koskela RS
Published in: Epidemiology 2002; 13 (3): 356-359
Aim of study (acc. to author)
Further details
Endpoint/type of risk estimation
Type of risk estimation:
(odds ratio (OR))
Exposure
Assessment
- list: subscription lists of two cellular network providers in Finland with information about the telephone type (analog or digital), start and end date of subscription
Exposure groups
|
Group
|
Description
|
|
Reference group 1
|
analog, subscription: never
|
|
Group 2
|
analog, subscription: ever
|
|
Group 3
|
analog, duration of subscription: < 1 year
|
|
Group 4
|
analog, duration of subscription: 1-2 years
|
|
Group 5
|
analog, duration of subscription: > 2 years
|
|
Reference group 6
|
digital, subscription: never
|
|
Group 7
|
digital, subscription: ever
|
|
Group 8
|
digital, duration of subscription: < 1 year
|
|
Group 9
|
digital, duration of subscription: 1-2 years
|
|
Group 10
|
digital, duration of subscription: > 2 years
|
Population
-
Group:
-
Age:
20–69 years
-
Observation period:
1996
-
Study location:
Finland
Case group
Control group
-
Selection:
-
Matching:
- sex
- age
- case:control = 1:5
-
Exclusion criteria:
previous tumor diagnosis
Study size
|
Cases |
Controls |
| Eligible |
432 |
2,156 |
| Evaluable |
432 |
2,156 |
Statistical analysis method:
- conditional logistic regression
Results (acc. to author)
Limitations (acc. to author)
The register-based approach has limited value in risk assessment of cellular phone use because it was not possible to verify whether the actual user of the cellular phone was the subscriber or someone else, e.g., a family member.
Study funded by
-
Tekes (National Technology Agency), Finland
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