Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 2,339 studies (Human Studies)
Ji S, Oh E, Sul D, Choi JW, Park H, Lee E. · 2004
Researchers used the Comet assay to measure Olive Tail Moment and Tail DNA% in T-cells, B-cells, and granulocytes before and after exposure. Olive Tail Moment and Tail DNA% in B-cells and granulocytes increased significantly after exposure.
Wilen J et al. · 2004
The study assessed electromagnetic field exposure among RF plastic sealer operators and examined their health status. Measurements showed mean electric field strength of 107 V/m and magnetic field strength of 0.24 A/m, with 11 of 46 sealers exceeding ICNIRP reference levels. RF operators, particularly ready-made clothing workers, had slightly disturbed two-point discrimination ability compared to controls. No significant difference in subjective symptom prevalence was found, but time-integrated exposure was linked to fatigue, headaches, and warmth sensations in the hands. RF operators also had significantly lower heart rate and more bradycardia episodes during 24-hour ECG monitoring.
Mancinelli F et al. · 2004
Researchers exposed tuna myoglobin solutions at pH 3.0 to a 1.95 MHz microwave field for 3 hours at a specific absorption rate of 51±1 mW/g. They monitored heme site refolding by measuring molecular absorption in the Soret spectral region and fitted the data to a bi-exponential model. The kinetics of exposed samples appeared slowered by the microwave field. The tryptophanyl lifetime distribution of the exposed protein appeared sharper than that of non-exposed samples. The researchers suggested that microwave fields could affect the propensity of myoglobin molecules to populate specific conformational substates and alter aggregation during folding, representing a potential misfolding risk.
Hinrikus H, Parts M, Lass J, Tuulik V. · 2004
Twenty healthy volunteers were exposed to 450 MHz microwaves with 7 Hz on-off modulation, with a field power density of 0.16 mW/cm2 at the scalp. The study focused on the effect of low level microwave radiation on human EEG alpha and theta rhythms. Microwave and photic exposure did not cause statistically significant changes in EEG activity for the whole group, though changes varied strongly from subject to subject.
Capri M et al. · 2004
Researchers exposed human peripheral blood mononuclear cells (PBMCs) from healthy donors in vitro to a 900 MHz GSM or continuous-wave (CW) radiofrequency field for 1 hour per day for 3 days. The researchers studied mitogen-induced proliferation, cell cycle progression, spontaneous and induced apoptosis, and mitochondrial membrane potential. GSM-exposed cells showed a slight decrease in proliferation at the lowest mitogen concentration and a slight increase in cells with altered phosphatidylserine distribution, but cell cycle phases, mitochondrial membrane potential, and susceptibility to apoptosis were unaffected. When cells were exposed to the CW radiofrequency field, no significant modifications were observed for any of the endpoints studied.
Lupke M, Rollwitz J, Simkó M. · 2004
Researchers investigated how 50 Hz extremely low frequency magnetic fields activate human cells to release reactive oxygen intermediates. They examined free radical production in human umbilical cord blood-derived monocytes and in human Mono Mac 6 cells. Exposure to 1 mT ELF-MF for 45 minutes produced a significant increase in superoxide radical anion production of up to 1.4 fold and an increase in ROS release of up to 1.2 fold in monocytes. Mono Mac 6 cells showed superoxide radical anion and ROS production of up to 1.4 and 1.5 fold, respectively, leading the researchers to suggest these cells are more sensitive to ELF-MF than monocytes.
Ding GR et al. · 2004
Researchers tested whether exposure to an extremely low frequency magnetic field affects hydrogen peroxide-induced cell death in human leukaemia HL-60 cells. Simultaneous treatment with the magnetic field and hydrogen peroxide for 24 hours significantly increased the number of apoptotic and necrotic cells compared with cells treated with hydrogen peroxide alone. The researchers found that active caspase-7 protein levels were higher in cells exposed to both the magnetic field and hydrogen peroxide than in those treated with hydrogen peroxide alone, and that poly(ADP-ribose) polymerase cleavage occurred earlier under combined exposure.
Sarimov R et al. · 2004
Researchers exposed lymphocytes from seven healthy persons to GSM microwaves at different frequencies in the range of 895-915 MHz and measured changes in chromatin conformation. A 30-min exposure at 900 and 905 MHz produced statistically significant condensation of chromatin in lymphocytes from 1 of 3 tested donors. Stronger effects were found following 1-h exposure, with chromatin condensation in 3 donors and decondensation in 1 donor. The observed chromatin changes were similar to effects of heat shock within the temperature window of 40/spl deg/C-44/spl deg/C.
Busljeta I, Trosic I, Milkovic-Kraus S. · 2004
The study observed erythropoietic changes in rats subchronically exposed to radiofrequency microwave radiation at a nonthermal level. Adult male Wistar rats were exposed to 2.45 GHz continuous RF/MW fields for 2 hours daily, 7 days a week, at 5 – 10 mW/cm2. In exposed animals, erythrocyte count, haemoglobin and haematocrit were increased in peripheral blood on irradiation days 8 and 15. Anuclear cells and erythropoietic precursor cells were significantly decreased in the bone marrow on day 15, while micronucleated cells' frequency was increased.
Scarfi MR et al. · 2003
The study aimed to investigate the genotoxic effect of THz radiation on human peripheral blood lymphocytes after 20 minutes of exposure to 1 mW average power Free Electron Laser radiation at 120-140 GHz. Nine healthy donors were employed and the cytokinesis block technique was used to measure micronucleus frequency and cell proliferation. The results indicated that the electromagnetic conditions did not alter micronucleus frequency or cell proliferation, suggesting no direct chromosomal damage or cell cycle alteration (p > 0.05).
Unknown authors · 2003
The study investigated electrosensibility in 708 adults aged 17 to 60 years using perception thresholds to 50 Hz electric currents. Analysis of perception threshold distributions revealed a subgroup with significantly increased electrosensibility that could be differentiated from the general population. The variation in electrosensibility was significantly larger than estimated by nonionizing radiation protection bodies but much smaller than claimed by hypersensitivity self-aid groups. The investigation method presented is capable of exclusion diagnostics for persons suffering from the hypersensitivity syndrome.
Unknown authors · 2003
The study evaluated associations between suicide and occupational exposure to electromagnetic fields, pesticides, and hydrocarbon solvents. It used 11,707 suicide deaths and 132,771 controls from U.S. death certificates for 1991 and 1992. Exposure was assigned based on job title on the death certificates. Electromagnetic fields and pesticides showed weak associations with suicide risk, while hydrocarbon solvents showed little evidence of increased risk. The electromagnetic field association was highest for ages 20 to 35 (OR = 1.5) and the pesticide association was highest for ages 35 to 49 (OR = 1.5).
Unknown authors · 2003
This nested case-control study examined 387 prostate cancer deaths and five controls per case among US electric utility workers. Workers in the highest 10 percent of EMF exposure had an odds ratio of 2.02 for prostate cancer mortality after adjustment for PCB exposure, race, and active work status within the past 2 years. The odds ratio for PCB exposure and prostate cancer mortality was 1.47 with a 95% confidence interval of 0.97 to 2.24 after adjustment for suspected confounding factors. Exposure to high levels of both EMFs and PCBs showed no association with prostate cancer mortality.
Unknown authors · 2003
Residential magnetic field exposure was calculated as a time-weighted average from 1967 until diagnosis using distance, line configuration, and current load, while occupational exposure was classified by an expert panel into three levels based on hours per week above background. The two highest residential exposure categories showed increased odds ratios for women (2.01 and 2.68) but not for men (1.70 and 1.37), and occupational exposure showed no significant association.
Unknown authors · 2003
Researchers studied 15 men chronically exposed to 50-Hz magnetic fields for 1–20 years and 15 unexposed controls. Exposure levels for the exposed group ranged from 0.1 to 2.6 μT weekly geometric mean. Blood samples were taken hourly from 2000 to 0800 and nighttime urine was also collected and analyzed. The study found no changes in plasma melatonin, urinary 6-sulfatoxymelatonin, or circadian rhythm in the exposed group.
Unknown authors · 2003
Researchers conducted a population-based case-control study of 491 children with acute lymphoblastic leukemia and 491 matched controls in Québec. Maternal occupational ELF-MF exposure during pregnancy was estimated from prenatal occupational history using three metrics. Comparing the highest 10% of exposed mothers to others, leukemia risk was moderately increased across all metrics. The highest odds ratio was 2.5 (95% confidence interval = 1.2-5.0) for maximum exposure of 0.4 microtesla or more.
Unknown authors · 2003
The study examined a cohort of 537,692 men and 180,529 women in the Swedish engineering industry. Exposure to extremely low-frequency magnetic fields was assessed using a job exposure matrix with four levels. Alzheimer's disease risk increased with exposure, reaching a relative risk of 4.0 (95% CI 1.4-11.7) in the highest exposure group. ALS showed a relative risk of 2.2 (95% CI 1.0-4.7) in the highest exposure group with a suggested exposure-response relationship. No increased risk was found for Parkinson's disease or multiple sclerosis.
Unknown authors · 2003
The study included all economically active individuals in the Swedish 1980 census (4,812,646 subjects) and followed them for neurodegenerative disease mortality from 1981 through 1995. A job-exposure matrix based on magnetic field measurements was used to assess EMF exposure. Men exposed in both 1970 and 1980 had an increased Alzheimer's disease mortality risk (relative risk 2.3 for exposure >/=0.5 microT). The association was strongest for early-onset Alzheimer's disease or with 10-year follow-up after last occupation. Amyotrophic lateral sclerosis was not linked to EMF exposure, but electrical and electronics work showed a risk estimate of 1.4.
Unknown authors · 2003
Unknown authors · 2003
Unknown authors · 2003
This nested case-control study tested whether exposure to electromagnetic fields from high-voltage power lines increases hematological cancer incidence in adults. Residential time-weighted average magnetic fields were calculated from 1967 until diagnosis using cut-off points at 0.05 and 0.20 microT. The two highest residential exposure categories showed non-significant elevated odds ratios for all leukemia combined (OR 1.3, 95% CI 0.7-2.5 and OR 1.5, 95% CI 0.8-3.0). The increased risk was confined to chronic lymphocytic leukemia, acute lymphocytic and acute myeloid leukemia. Occupational exposure showed no significant association for any cancer site.
Unknown authors · 2003
Researchers conducted a survey of 530 people living near or not near cellular phone base stations. They compared frequencies of 16 non-specific health symptoms using a chi-square test with Yates correction. Older subjects showed a significant increase in symptoms. Facing the base station within 100 meters was the worst position for some symptoms. No significant difference was found for exposure duration except irritability increased after more than five years, and other electromagnetic factors also affected symptom frequency.
Zhang MB, Jin LF, He JL, Hu J, Zheng W. · 2003
The study aimed to investigate the combined DNA-damaging effects of low-intensity 2,450 MHz microwave radiation with three chemical mutagens on human lymphocyte DNA. Microwave exposure alone did not significantly increase comet tail length compared with controls at 0 h or 21 h incubation. When lymphocytes were incubated with 30.00 micro mol/L or 3.00 micro mol/L MMC, microwave exposure significantly increased comet tail lengths compared with MMC alone. Combinations of microwave with BLM or MMS did not produce significantly greater DNA damage than BLM or MMS alone.
Zeni et al. · 2003
Warren HG, Prevatt AA, Daly KA, Antonelli PJ. · 2003
Researchers conducted a case-control study using a structured telephone survey at an academic tertiary-care referral center, matching 18 patients with IFN tumors to control groups with acoustic neuroma, rhinosinusitis, and dysphonia or gastroesophageal reflux disease. The odds ratio for developing an IFN tumor was 0.6 (95% CI, 0.2-1.9) with any handheld cellular telephone use and 0.4 (95% CI, 0.1-2.1) with regular cellular telephone use. No factors were associated with an increased risk for IFN tumor development, and regular cellular telephone use did not appear to be associated with a higher risk.