Study type:
Epidemiological study
(observational study)
Residential exposure to extremely low-frequency magnetic fields and risk of childhood leukaemia, CNS tumour and lymphoma in Denmark
epidem.
By:
Pedersen C, Johansen C, Schüz J, Olsen JH, Raaschou-Nielsen O
Published in: Br J Cancer 2015; 113 (9): 1370-1374
Aim of study (acc. to author)
Further details
Analyses were conducted separately for each cancer type and for all three cancers combined. Relative risks were estimated for the period 1968-1986, 1987-2003 and for the total period 1968-2003.
Endpoint/type of risk estimation
Type of risk estimation:
(relative risk (RR))
Exposure
Assessment
- calculation: magnetic flux density based on distance of the residence to the next high voltage installation including type of line, type of pylons, ordering of phases, current flow in the line and dates of construction and reconstructions
Exposure groups
|
Group
|
Description
|
|
Reference group 1
|
magnetic flux density:< 0.1 µT
|
|
Group 2
|
magnetic flux density: 0.1 - 0.39 µT
|
|
Group 3
|
magnetic flux density: ≥ 0.4 µT
|
Population
-
Group:
-
Age:
0–14 years
-
Observation period:
1968 - 2003
-
Study location:
Denmark
Case group
Control group
- children born in Denmark, who were alive without a previous cancer diagnosis and living in Denmark
-
Selection:
-
Matching:
Study size
|
Cases |
Controls |
| Eligible |
3,277 |
9,129 |
Statistical analysis method:
- conditional logistic regression
Results (acc. to author)
Study funded by
-
CHILDREN with CANCER UK
-
Danish Cancer Society
-
Danish Energy Agency (Energistyrelsen)
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