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Control Study of Residential and Personal Magnetic Field Measures and Miscarriges
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19.02.2006
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Geraldine M. Lee, Raymond R. Neutra, Lilia Hristova, Michael Yost, and
Robert A. Hiatt
Abstract:
We conducted a nested case-control study (177 cases, 550 controls) to assess the relation between retrospective magnetic field measures and clinical miscarriage among members
of the northern California Kaiser Permanente medical care system. We also conducted a prospective substudy of 219 participants of the same parent cohort to determine whether 12-week and 30-week exposure assessments were similar. We evaluated wire codes, area measures, and three personal meter metrics: (1) the average difference between consecutive levels (a rate-of-change metric), (2) the maximum level, and (3) the time-weighted average. For wire codes and area measures we found little association. For the personal metrics (30 weeks after last menstrual period), we found positive associations. Each exposure was divided into quartiles, with the lowest quartile as referent. Starting with the highest quartile, adjusted odds ratios and 95% confidence intervals were 3.1 (95% CI 1.6–6.0), 2.3 (95% CI 1.2– 4.4), and 1.5 (95% CI
0.8 –3.1) for the rate-of-change metric; 2.3 (95% CI 1.2– 4.4), 1.9 (95% CI 1.0 –3.5), and 1.4 (95% CI 0.7–2.8) for the maximum value; and 1.7 (95% CI 0.9 –3.3), 1.7 (95% CI 0.9 –3.3), and 1.7 (95% CI 0.9 –3.3) for the timeweighted average. The odds ratio conveyed by being above a 24-hour time-weighted average of 2 milligauss was 1.0 (95% CI 0.5–2.1). Exposure assessment measurements at 12 weeks were poorly correlated with those taken at 30 weeks. Nonetheless, the prospective substudy results regarding miscarriage risk were consistent with the nested study results.
(EPIDEMIOLOGY 2002;13:21–31)
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Hits: 921
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DNA damage in Molt-4 T-lymphoblastoid cells exposed to cellular telephone RFs In Vitro
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19.02.2006
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DNA damage in Molt-4 T-lymphoblastoid cells exposed to cellular telephone radiofrequency fields in vitro
Jerry L. Phillips , Oleg Ivaschuk, Tamako Ishida-Jones, Robert A. Jones, Mary Campbell-Beachler, Wendy Haggren
Pettis VA Medical Center, Research 151, Loma Linda, CA 92357, USA
Received 3 November 1997; revised 16 December 1997; accepted 9 January 1998
Abstract
Molt-4 T-lymphoblastoid cells have been exposed to pulsed signals at cellular telephone frequencies of 813.5625 MHz iDENw signal.and 836.55 MHz TDMA signal.. These studies were performed at low SAR averages2.4 and 24 mW gy1 for iDENw and 2.6 and 26 mW gy1 for TDMA. in studies designed to look for athermal RF effects. The alkaline comet, or single cell gel electrophoresis, assay was employed to measure DNA single-strand breaks in cell cultures exposed to the radiofrequency RF. signal as compared to concurrent sham-exposed cultures. Tail moment and comet extent were calculated as indicators of DNA damage. Statistical differences in the distribution of values for tail moment and comet extent between exposed and control cell cultures were evaluated with the Kolmogorov–Smirnoff distribution test. Data points for all experiments of each exposure condition were pooled and analyzed as single groups. It was found that: 1) exposure of cells to the iDENw signal at an SAR of 2.4 mW gy1 for 2 h or 21 h significantly decreased DNA damage;
2) exposure of cells to the TDMA signal at an SAR of 2.6 mW gy1 for 2 h and 21 h significantly decreased DNA damage;
3) exposure of cells to the iDENw signal at an SAR of 24 mW gy1 for 2h and 21 h significantly increased DNA damage; 4. exposure of cells to the TDMA signal at an SAR of 26 mW gy1 for 2 h significantly decreased DNA damage. The data indicate a need to study the effects of exposure to RF signals on direct DNA damage and on the rate at which DNA damage is repaired. q1998 Elsevier Science S.A.
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Hits: 454
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Neurological Effects of Radiofrequency Electromagnetic Radiation Relating to Wireless Communication
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19.02.2006
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Paper presented at the IBC-UK Conference: "Mobile Phones - Is there a Health Risk?" September 16-17, 1997 in Brussels, Belgium. Dr. Henry Lai.
Bioelectromagnetics Research Laboratory,
Department of Bioengineering,
University of Washington,
Seattle, Washington, USA
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Hits: 454
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Genetic Effects of Nonionizing Electromagnetic Fields
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19.02.2006
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Paper presented at the “International Workshop on Biological Effects of Ionizing Radiation, Electromagnetic Fields and Chemical Toxic Agents” in Sinaia, Romania, October 2-6, 2001.
Genetic Effects of Nonionizing Electromagnetic Fields
Henry Lai
Bioelectromagnetics Research Laboratory
Department of Bioengineering
University of Washington
Seattle, WA
USA
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Hits: 527
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Electromagnetic Fields, the Modulation of Brain Tissue Functions
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19.02.2006
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International Encyclopedia of Neuroscience Third Edition; B. Smith and G. Adelman, editors.
Elsevier, New York
Author: W. Ross Adey
Distinguished Professor of Physiology
Loma Linda University School of Medicine
Loma Linda California 92354 USA
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