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Evid Based Nurs 1:55 doi:10.1136/ebn.1.2.55
  • Causation

Childhood acute lymphoblastic leukaemia was not linked to residential exposure to power line magnetic fields

Objective

To determine whether an association exists between residential exposure to magnetic fields from power lines and the development of childhood acute lymphoblastic leukaemia (ALL).

Design

Case control study.

Setting

Community based study in 9 states of the USA.

Participants

Case participants were children who were diagnosed with ALL before the age of 15 years between 1989 and 1994. Control group children were matched for age, race, and the first 8 digits of their telephone number. Magnetic field measurements and residential history were available for 629 children with ALL and 619 control group children who had participated in an initial telephone survey; 463 case control pairs were included in the matched analysis.

Assessment of risk factors

For children <5 years of age, magnetic fields were measured in homes that the children had lived in for ≥6 months and spent ≥70% of their lives. For children ≥5 years of age, measurements were done in the homes in which the children had spent ≥70% …

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