A case-control study was conducted in the USA to investigate the relation between residential exposure to magnetic fields and the development of childhood cancer.
Electric and magnetic fields exposure was assessed by measurements in the residence where the child lived prior diagnosis and by wire configuration code.
Group | Description |
---|---|
Reference group 1 | magnetic fields, low power use conditions: 0 - < 0.65 mG |
Group 2 | magnetic fields, low power use conditions: 0.65 - < 1.0 mG |
Group 3 | magnetic fields, low power use conditions: 1.0 - < 2.5 mG |
Group 4 | magnetic fields, low power use conditions: ≥ 2.5 mG |
Reference group 5 | magnetic fields, high power use conditions: 0 - < 0.65 mG |
Group 6 | magnetic fields, high power use conditions: 0.65 - < 1.0 mG |
Group 7 | magnetic fields, high power use conditions: 1.0 - < 2.5 mG |
Group 8 | magnetic fields, high power use conditions: ≥ 2.5 mG |
Reference group 9 | electric fields, high power use conditions: 0 - < 6.0 V/m |
Group 10 | electric fields, high power use conditions: 6.0 - < 9.0 V/m |
Group 11 | electric fields, high power use conditions: 9.0 - < 14.0 V/m |
Group 12 | electric fields, high power use conditions: ≥ 14.0 V/m |
Group 13 | magnetic fields, low power use conditions: < 2.0 mG |
Group 14 | magnetic fields, low power use conditions: ≥ 2.0 mG |
Group 15 | magnetic fields, high power use conditions: < 2.0 mG |
Group 16 | magnetic fields, high power use conditions: ≥ 2.0 mG |
Group 17 | electric fields, high power use conditions: < 12.0 V/m |
Group 18 | electric fields, high power use conditions: ≥ 12.0 V/m |
Reference group 19 | wire code at time of diagnosis: buried |
Group 20 | wire code at time of diagnosis: very low |
Group 21 | wire code at time of diagnosis: low |
Group 22 | wire code at time of diagnosis: high |
Group 23 | wire code at time of diagnosis: very high |
Reference group 24 | wire code 2 years before diagnosis: buried |
Group 25 | wire code 2 years before diagnosis: very low |
Group 26 | wire code 2 years before diagnosis: low |
Group 27 | wire code 2 years before diagnosis: high |
Group 28 | wire code 2 years before diagnosis: very high |
Reference group 29 | wire code: buried, very low and low |
Group 30 | wire code: high and very high |
Cases | Controls | |
---|---|---|
Eligible | 356 | 278 |
Participants | 252 | 222 |
Participation rate | 71 % | 80 % |
Measurements of electric and magnetic fields were taken at 128 residences of cases and in 207 of controls, wire codes were obtained for 319 cases and 259 controls.
A modest association for childhood cancer and magnetic fields measured under low power conditions was observed whereas no association for magnetic fields measured under high power conditions was found. Electric fields were not related to childhood cancer. An increased risk for all types of cancer was observed for high and very high wire codes.
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