Unknown authors · 1993
Researchers surveyed people living near high-voltage power transmission lines in 1987 and found those with homes close to the lines had nearly three times higher rates of depressive symptoms compared to those living farther away. The association remained strong even after accounting for demographics and attitudes about power lines, suggesting the electromagnetic fields from transmission lines may affect mental health.
Unknown authors · 1993
Swedish researchers studied 142 children who developed cancer while living within 300 meters of high-voltage power lines from 1960-1985. Children exposed to magnetic fields above 0.2 microtesla had 2.7 times higher leukemia risk, with risk increasing to 3.8 times at 0.3 microtesla levels. The association was specific to leukemia and did not appear for other childhood cancers.
Unknown authors · 1993
This 1993 Finnish study examined cancer risk in children living near power lines, contributing to early research on extremely low frequency magnetic fields and childhood leukemia. The research focused on developing better methods to combine data from different types of studies to overcome the challenge of studying rare diseases like childhood cancer.
Unknown authors · 1993
This 1993 BMJ study examined cancer risks in children living near high voltage power lines and facilities. The research focused on developing better methods to combine data from multiple studies of different designs to overcome the challenge of studying rare diseases like childhood leukemia. The work aimed to improve how scientists pool research data to draw stronger conclusions about electromagnetic field health effects.
Unknown authors · 1993
Researchers found six cases of testicular cancer among 340 police officers between 1979 and 1991, nearly seven times higher than expected. The only common factor was that all affected officers regularly used handheld radar guns positioned close to their testicles during traffic enforcement. This study suggests occupational radar exposure may increase testicular cancer risk.
Unknown authors · 1992
Scientists discovered magnetite crystals naturally occurring in human brain tissue for the first time, finding millions of these magnetic particles per gram in various brain regions. The crystals resemble those found in magnetotactic bacteria and fish, suggesting biological formation. This discovery may explain how low-frequency magnetic fields could potentially affect brain function.
Unknown authors · 1991
Researchers studied 232 children with leukemia and 232 healthy controls in Los Angeles County, measuring magnetic and electric fields in their homes and analyzing electrical wiring configurations. While direct EMF measurements showed no clear cancer risk, children living in homes with high-current electrical wiring had more than double the leukemia risk compared to those in low-EMF wiring configurations.
Unknown authors · 1990
This 1990 case-control study examined 374 childhood cancer cases in Yorkshire, England, comparing them to 588 healthy controls to determine if living near overhead power lines increased cancer risk. Researchers calculated magnetic field strengths at children's birth addresses and found no association between childhood cancer and either proximity to power lines or magnetic field exposure.
Unknown authors · 1989
Researchers in Wolverhampton, UK surveyed homes to see if 50 Hz magnetic field strength from power lines correlated with depression and heart attacks. They found significantly higher magnetic field levels at homes of people with depression, but no connection to heart attacks.
Unknown authors · 1989
This study examined whether living near power lines and electrical substations increases leukemia risk in southeast England. Researchers found a relative risk of 2.0 for leukemia within 50 meters of overhead power lines, but the confidence interval was wide (95% CI 0.4-9.0), so the result was not statistically significant. The study found no significant association between residential proximity to electrical infrastructure and leukemia risk.
Unknown authors · 1988
This 1988 Denver study examined 356 children with cancer and compared their home magnetic field exposures to healthy controls. Children living in homes with magnetic fields above 2.0 milligauss had 40% higher cancer rates overall, with even stronger associations for leukemia (90% higher) and lymphomas (120% higher). The study also found that homes near high-voltage power lines had significantly more childhood cancer cases.
Unknown authors · 1988
Nine telecommunications workers were accidentally exposed to 4.1 GHz radio-frequency radiation, with two receiving high doses of 4.6 mW/cm² for up to 90 minutes. Despite comprehensive medical examinations and nine months of follow-up, researchers found no harmful health effects except possibly hair loss.
Unknown authors · 1986
This 1986 Swedish study examined 716 childhood cancer cases in Stockholm County, comparing magnetic field exposure from power lines at children's homes to matched controls. Children living near 200-kV power lines or in areas with magnetic fields above 0.3 μT had twice the cancer risk, with the strongest association for nervous system tumors.
Unknown authors · 1982
Two men accidentally exposed to X-band microwave radiation developed identical psychological symptoms including emotional instability, irritability, headaches, and insomnia, followed by hypertension months later. Doctors found no other medical explanation for these symptoms. This case study provides circumstantial evidence that acute microwave exposure can cause lasting neurological and cardiovascular effects.
Unknown authors · 1982
Researchers measured melatonin levels over 24 hours in 20 women with early-stage breast cancer. Women with estrogen receptor positive tumors had significantly lower nighttime melatonin peaks compared to healthy controls, with the lowest melatonin levels corresponding to the highest estrogen receptor concentrations. This suggests disrupted melatonin production may be linked to certain types of breast cancer.
Unknown authors · 1980
Queensland researchers tracked skin cancer rates from 1966 to 1977, finding that malignant melanoma cases doubled from 16 to 32.7 per 100,000 people. The good news: doctors were catching tumors earlier and smaller, suggesting improved detection was partly responsible for the increased numbers.
Unknown authors · 1979
This 1979 study examined suicide rates near high-voltage power lines in England's Midlands region. Researchers found a correlation between proximity to transmission line electromagnetic fields and increased suicide occurrence. This was one of the first studies to suggest a link between power line EMF exposure and mental health effects.
Unknown authors · 1979
Researchers in Colorado studied homes where children developed cancer between 1976-1977 and found an excess of electrical wiring configurations that suggested high current flow near these homes compared to control homes. The correlation appeared strongest for children who had lived at the same address their entire lives and showed a dose-response relationship.
