Epidemiological study (observational study)

Case-Control Study on Occupational Exposure to Extremely Low-Frequency Electromagnetic Fields and the Association with Meningioma epidem.

By: Carlberg M, Koppel T, Ahonen M, Hardell L

Published in: Biomed Res Int 2018; 2018: 5912394

Type of risk estimation:

(odds ratio (OR))

questionnaire: occupational history including job title, branch, first and last year for each job
calculation: cumulative exposure, average exposure, maximum exposed job
job exposure matrix

Group	Description
Reference group 1	cumulative exposure: < 2.33 µT-years
Group 2	cumulative exposure: 2.33 - < 3.79 µT-years
Group 3	cumulative exposure: 3.79 - < 5.55 µT-years
Group 4	cumulative exposure: 5.55 - < 8.52 µT-years
Group 5	cumulative exposure: ≥ 8.52 µT-years
Reference group 6	average exposure: < 0.11 μT
Group 7	average exposure: 0.11 - < 0.13 μT
Group 8	average exposure: 0.13 - < 0.18 μT
Group 9	average exposure: 0.18 - < 0.27 μT
Group 10	average exposure: ≥ 0.27 μT
Reference group 11	maximum exposed job: < 0.13 μT
Group 12	maximum exposed job: 0.13 - < 0.16 μT
Group 13	maximum exposed job: 0.16 - < 0.24 μT
Group 14	maximum exposed job: 0.24 - < 0.60 μT
Group 15	maximum exposed job: ≥ 0.60 μT

	Cases	Controls
Participants	1,625	3,530
Evaluable	1,592	3,485

Statistical analysis method:

(adjustment:

)

No statistically significant increased or decreased risk was found for any of the studied variables (cumulative exposure (group 5 versus group 1): OR 0.9, CI 0.7–1.2; average exposure (group 10 versus group 6): OR 0.9, CI 0.7-1.2; maximum exposed job (group 15 versus group 11): OR 0.8, CI 0.6-1.01).
The authors concluded that no association between occupational exposure to extremely low-frequency magnetic fields and meningioma risk was found.

Carlberg M et al. (2020): Case-control study on occupational exposure to extremely low-frequency electromagnetic fields and the association with acoustic neuroma
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