Study type:
Epidemiological study
(observational study)
Evaluation of occupational exposure to magnetic fields and motor neuron disease mortality in a population-based cohort
epidem.
By:
Parlett LE, Bowman JD, van Wijngaarden E
Published in: J Occup Environ Med 2011; 53 (12): 1447-1451
Aim of study (acc. to author)
Endpoint/type of risk estimation
Exposure
Assessment
Exposure groups
Group
|
Description
|
Reference group 1
|
magnetic field exposure: < 0.16 µT
|
Group 2
|
magnetic field exposure: 0.16 - 0.21 µT
|
Group 3
|
magnetic field exposure: 0.21 - 0.27 µT
|
Group 4
|
magnetic field exposure: > 0.27 µT
|
Population
-
Group:
-
Characteristics:
individuals for whom occupational codes were available
-
Observation period:
1980 - 1989
-
Study location:
USA
-
Data source:
National Longitudinal Mortality Study (NLMS)
-
Exclusion criteria:
unemployed and retired individuals
Study size
Other:
40 deaths due to motoneuron diseases
Statistical analysis method:
- Cox proportional regressions analysis
(
adjustment:
)
Results (acc. to author)
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