Szmigielski et al. · 1998
Polish researchers studied 61 workers exposed to radiofrequency EMF at radio stations and compared their daily blood pressure and heart rate patterns to 42 unexposed workers. They found that EMF exposure disrupted the natural daily rhythms of both blood pressure and heart rate, with higher exposure levels causing more pronounced effects. This suggests that radiofrequency radiation may interfere with the body's autonomic nervous system, which controls these vital functions.
Hardell L, Nasman A, Ohlson CG, Fredrikson M. · 1998
Swedish researchers studied 148 men with testicular cancer and 314 healthy controls to identify occupational risk factors. They found that men working with video display units (computer screens) had an 80% higher risk of testicular cancer after extended exposure (about 480 working days). Amateur radio operators, radar workers, and electronics engineers also showed elevated risks, though based on smaller numbers of cases.
Hanson Mild et al. · 1998
Swedish and Norwegian researchers compared symptoms between users of older analog mobile phones (NMT) and newer digital phones (GSM) in a large study of over 17,000 people. Surprisingly, they found that digital phone users actually reported fewer symptoms like warmth sensations around the ear compared to analog users, contradicting their initial hypothesis. However, both phone types showed a clear pattern: the more people talked on their phones, the more they experienced symptoms like headaches, fatigue, and ear warmth.
Freude, G, Ullsperger, P, Eggert ,S, Ruppe, I · 1998
German researchers studied how cell phone radiation affects brain wave patterns by having men perform simple finger movements and complex visual tasks while exposed to phone emissions. They found that radiation significantly altered slow brain potentials (electrical patterns that prepare the brain for action) during the demanding cognitive task, but not during simple movements. This suggests cell phone radiation can interfere with brain electrical activity during mentally challenging activities, even when performance appears normal.
Eulitz, C, Ullsperger, P, Freude, G, Elbert ,T · 1998
German researchers examined how mobile phone radiation affects brain activity by measuring electrical responses while people listened to sounds. They found that phone radiation altered specific patterns of brain activity, particularly in higher frequency brain waves when people were actively processing important sounds. This suggests mobile phones can directly change how our brains process information.
Duan L, Shan Y, Yu X · 1998
Chinese researchers tested brain function in workers exposed to high-frequency electromagnetic radiation using standardized tests recommended by the World Health Organization. They found that exposed workers scored significantly lower on multiple brain performance measures compared to unexposed controls, and these changes correlated with symptoms of neurasthenia (a condition involving mental fatigue and cognitive difficulties). This suggests that occupational exposure to high-frequency EMF can measurably impair cognitive function.
Daniells et al. · 1998
Scientists exposed genetically modified nematode worms to microwave radiation at 750 and 300 MHz frequencies and measured their cellular stress responses through a special gene that acts like a biological alarm system. The worms showed significant stress responses to the microwave exposure, with the strongest effects occurring closest to the radiation source and weaker responses at lower power levels. This suggests the radiation was causing cellular damage similar to what toxic metals produce, rather than simple heating effects.
Bergdahl J, Tillberg A, Stenman E. · 1998
Swedish researchers examined 28 patients who reported health symptoms they believed were caused by electricity or computer screens (visual display units). The study found these patients had various dental and oral health problems, including jaw dysfunction, mouth burning, and reduced saliva production. While the study couldn't prove electricity caused these symptoms, it suggests that dental health issues might contribute to the suffering experienced by people who report electrical sensitivity.
Szmigielski et al. · 1998
Researchers studied 61 workers exposed to radio frequency electromagnetic fields and found their natural daily blood pressure and heart rate patterns were disrupted - the normal peaks and valleys were flattened and shifted earlier, suggesting EMF exposure interferes with the body's cardiovascular rhythms.
Unknown authors · 1997
FDA researchers exposed human T-lymphocyte immune cells to 60 Hz magnetic fields at 0.15 mT (1,500 times stronger than typical household levels) to test whether power line frequencies affect cellular calcium signaling. The study found no changes in intracellular calcium responses under both optimal and stressed cell conditions. However, researchers noted this doesn't rule out effects on other calcium-dependent processes deeper in the cellular pathway.
Unknown authors · 1997
Swedish researchers tested 10 people claiming electrical hypersensitivity and 10 healthy controls by exposing them to flickering light while measuring brain activity. They found that electrically hypersensitive patients showed significantly stronger brain responses to the visual stimulation compared to healthy people, even though their eye responses were normal. This suggests these patients may have heightened nervous system sensitivity that makes them more reactive to environmental stimuli.
Unknown authors · 1997
This 1997 literature review examined skin changes in people reporting "screen dermatitis" from video display terminals and found striking similarities to UV and radiation damage. Researchers documented identical cellular changes including increased mast cells and loss of protective Langerhans cells. The findings suggest EMF exposure may trigger the same inflammatory pathways as known radiation damage.
Unknown authors · 1997
Researchers studied 163 visual display terminal (VDT) workers in Sweden to investigate facial skin symptoms. They found that psychosocial workplace stress, especially lack of social support, increased skin complaints, and this stress appeared to interact with electric fields from computer equipment to worsen symptoms.
Unknown authors · 1997
Researchers in Taiwan studied 3,427 cancer cases to examine whether living near power lines increases cancer risk. They found that people exposed to magnetic fields above 0.2 microtesla had a 40% higher risk of leukemia, and those living within 50 meters of transmission lines faced double the leukemia risk. No increased risk was found for brain tumors or breast cancer.
Unknown authors · 1997
Norwegian researchers studied children living near high-voltage power lines from 1965-1989 to determine if electromagnetic field exposure increases cancer risk. They found no association between magnetic field exposure and childhood cancers, including leukemia and brain tumors. However, the authors noted the study had limited statistical power due to small sample sizes.
Unknown authors · 1997
German researchers studied 129 children with leukemia and 328 healthy controls to examine whether living near power lines increases childhood leukemia risk. They found children exposed to magnetic fields above 0.2 microTesla had over three times higher leukemia odds, though the finding wasn't statistically significant due to small numbers. The results align with other international studies suggesting a possible link between residential power line EMF and childhood blood cancers.
Unknown authors · 1997
Researchers tracked 40,335 electric utility workers from 1960-1991 to study death rates from occupational exposures. They found field workers (linecrew, power plant staff) had 2.2-2.4 times higher rates of respiratory cancers compared to office workers. The study demonstrates clear occupational health risks for workers with higher EMF exposure levels.
Unknown authors · 1997
This 1997 analysis examined whether radiofrequency (RF) currents used for power grid communications might contribute to disease patterns near high-voltage lines. The study found that RF magnetic fields are present alongside standard 50/60 Hz power line fields, potentially creating additional exposure that hasn't been accounted for in health studies. This suggests epidemiological research linking power lines to leukemia may need to consider multiple frequency exposures, not just power frequency fields.
Unknown authors · 1997
Researchers studied 540 adults living near high-voltage power lines, measuring magnetic field exposure in their homes and testing their psychological health. They found that higher magnetic field exposure was linked to worse performance on coding tests and increased psychiatric symptoms, even after accounting for other factors.
Unknown authors · 1997
This 1997 physics-based analysis examined whether 50/60 Hz electromagnetic fields (power line frequencies) at residential levels could cause biological effects in humans. The researchers concluded that such effects are implausible based on current understanding of physics and biology, as the forces generated are far weaker than normal biological processes.
Unknown authors · 1997
This 1997 meta-analysis examined multiple studies on leukemia risk for people living near high-voltage power lines (49 kV and above). Researchers found a 30% increased leukemia risk for magnetic field exposures at 2 milligauss or higher, with risk increasing at higher exposure levels. The analysis included both adults and children living within 50 meters of transmission lines.
Unknown authors · 1997
Greek researchers studied 117 children with leukemia and 202 healthy controls to examine whether living near power lines increases childhood leukemia risk. Using four different methods to measure magnetic field exposure from electrical lines, they found no significant increase in leukemia risk at any exposure level. The study doesn't prove power lines are completely safe, but found no evidence of increased cancer risk.
Unknown authors · 1997
Researchers studied 163 office workers using visual display terminals (old computer monitors) to understand why some developed facial skin symptoms. They found that workplace stress and lack of social support increased skin problems, and these psychological factors appeared to interact with electric fields from the equipment to worsen symptoms.
Unknown authors · 1997
Finnish researchers studied 12,063 people living near high-voltage power lines and found that while general depression levels weren't affected, those living within 100 meters of transmission lines had a 4.7-fold increased risk of severe depression. The study tracked participants for 20 years and used standardized depression assessments.
Jauchem, JR, · 1997
Researchers reviewed studies examining how electromagnetic fields (EMFs) from power lines and radiofrequency radiation from devices like cell phones affect the human heart. They found that most studies showed no significant effects on blood pressure, heart rate, or heart rhythm patterns when exposure levels stayed below current safety standards. While some early Soviet studies in the 1960s suggested heart problems in electrical workers, later Western research could not confirm these findings.
