Magnetic Fields and Childhood Leukaemia
Author Information
Author(s): Ahlbom A, Day N, Feychting M, Roman E, Skinner J, Dockerty J, Linet M, McBride M, Michaelis J, Olsen J H, Tynes T, Verkasalo P K
Primary Institution: Division of Epidemiology, National Institute of Environmental Medicine, Karolinska Institute, Sweden
Hypothesis
Is there an association between exposure to 50–60 Hz magnetic fields and childhood leukaemia?
Conclusion
The study found that most children had no increased risk of leukaemia from low magnetic field exposure, but a small percentage with higher exposure had a relative risk estimate of about 2.
Supporting Evidence
- The study included 3203 children with leukaemia and 10,338 control children.
- Children with exposure levels < 0.4 μT had risk estimates compatible with no increased risk.
- Children with exposure levels ≥ 0.4 μT had a relative risk estimate of approximately 2.
- Adjustment for confounding variables did not change the results significantly.
- The study found no evidence for the wire-code paradox.
Takeaway
Most kids living in homes with low magnetic fields are safe, but a few kids with higher exposure might have a higher chance of getting leukaemia.
Methodology
A pooled analysis based on individual records from nine studies with magnetic field measurements.
Potential Biases
Selection bias may have accounted for some of the increase in risk.
Limitations
The explanation for the elevated risk is unknown, and selection bias may have influenced the results.
Participant Demographics
Children with leukaemia and control children from various studies.
Statistical Information
P-Value
0.002
Confidence Interval
1.27–3.13
Statistical Significance
p=0.002
Digital Object Identifier (DOI)
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