OBJECTIVES: To assess childhood cancer risks for electromagnetic field (EMF) exposures. METHODS: A case-control study was conducted in New Zealand. Cases (aged from zero to 14 years) were ascertained from national databases including the New Zealand Cancer Registry; 303 took part (participation rate, 88 percent). The 303 age- and gender-matched controls were selected randomly from birth records (participation, 69 percent). Mothers were interviewed about appliance exposures (all cases and controls), and 24-hour residential measurements of EMFs were made (leukemia cases and matched controls). RESULTS: For the various appliance exposures, there were some odds ratios (OR) above 1.0 and others below 1.0. For electric blanket use by the child before diagnosis, the adjusted ORs were: leukemia, 2.2 (95 percent confidence interval [CI] = 0.7-6.4); central nervous system cancers, ORs = 1.6 (CI = 0.4-7.1); and other solid cancers, OR = 2.4 (CI = 1.0-6.1). Leukemia risk was increased for the highest category of the mean measured bedroom magnetic field (> or = 0.2microT cf < 0.1 microT), with an adjusted OR of 15.5 (CI = 1.1-224). A gradient in OR with exposure was not shown (middle category: OR 1.4, CI = 0.3-7.6), and there was no association with exposure categorized into thirds based on controls' exposure. The adjusted OR for leukemia in relation to the measured daytime room magnetic field (> or = 0.2 microT cf < 0.1 microT) was 5.2 (CI = 0.9-30.8). CONCLUSIONS: This was a small study and multiple comparisons were made. The positive findings thus should be interpreted cautiously.
OBJECTIVES: To assess childhood cancer risks for electromagnetic field (EMF) exposures. METHODS: A case-control study was conducted in New Zealand. Cases (aged from zero to 14 years) were ascertained from national databases including the New Zealand Cancer Registry; 303 took part (participation rate, 88 percent). The 303 age- and gender-matched controls were selected randomly from birth records (participation, 69 percent). Mothers were interviewed about appliance exposures (all cases and controls), and 24-hour residential measurements of EMFs were made (leukemia cases and matched controls). RESULTS: For the various appliance exposures, there were some odds ratios (OR) above 1.0 and others below 1.0. For electric blanket use by the child before diagnosis, the adjusted ORs were: leukemia, 2.2 (95 percent confidence interval [CI] = 0.7-6.4); central nervous system cancers, ORs = 1.6 (CI = 0.4-7.1); and other solid cancers, OR = 2.4 (CI = 1.0-6.1). Leukemia risk was increased for the highest category of the mean measured bedroom magnetic field (> or = 0.2microT cf < 0.1 microT), with an adjusted OR of 15.5 (CI = 1.1-224). A gradient in OR with exposure was not shown (middle category: OR 1.4, CI = 0.3-7.6), and there was no association with exposure categorized into thirds based on controls' exposure. The adjusted OR for leukemia in relation to the measured daytime room magnetic field (> or = 0.2 microT cf < 0.1 microT) was 5.2 (CI = 0.9-30.8). CONCLUSIONS: This was a small study and multiple comparisons were made. The positive findings thus should be interpreted cautiously.
Authors: Leeka Kheifets; A Ahlbom; C M Crespi; M Feychting; C Johansen; J Monroe; M F G Murphy; S Oksuzyan; S Preston-Martin; E Roman; T Saito; D Savitz; J Schüz; J Simpson; J Swanson; T Tynes; P Verkasalo; G Mezei Journal: Am J Epidemiol Date: 2010-08-09 Impact factor: 4.897
Authors: G Chen; B L Upham; W Sun; C C Chang; E J Rothwell; K M Chen; H Yamasaki; J E Trosko Journal: Environ Health Perspect Date: 2000-10 Impact factor: 9.031
Authors: J Skinner; T J Mee; R P Blackwell; M P Maslanyj; J Simpson; S G Allen; N E Day; K K Cheng; E Gilman; D Williams; R Cartwright; A Craft; J M Birch; O B Eden; P A McKinney; J Deacon; J Peto; V Beral; E Roman; P Elwood; F E Alexander; M Mott; C E D Chilvers; K Muir; R Doll; C M Taylor; M Greaves; D Goodhead; F A Fry; G Adams; G Law Journal: Br J Cancer Date: 2002-11-18 Impact factor: 7.640
Authors: A Ahlbom; N Day; M Feychting; E Roman; J Skinner; J Dockerty; M Linet; M McBride; J Michaelis; J H Olsen; T Tynes; P K Verkasalo Journal: Br J Cancer Date: 2000-09 Impact factor: 7.640