Wdowiak A, Wdowiak L, Wiktor H. · 2007
The objective was to determine the effect of cellular phone usage on the fertility of males undergoing marital infertility therapy. The study included 304 men divided into groups: 99 who did not use mobile phones, 157 who used GSM equipment sporadically for 1-2 years, and 48 who regularly used mobile phones for more than 2 years. An increase in the percentage of sperm cells with abnormal morphology was associated with longer duration of exposure to waves emitted by GSM phones. A decrease in the percentage of sperm cells with vital progressive motility was correlated with the frequency of mobile phone use.
Virtanen H, Keshvari J, Lappalainen R. · 2007
Researchers examined the effect of authentic passive metallic implants in the head region. A half-wave dipole antenna was used as an exposure source and SAR in the near field was studied numerically at GSM (900 and 1800 MHz) and UMTS (2450 MHz) frequencies. Results indicate some implants under very rare exposure conditions may cause a notable enhancement in peak mass averaged SAR.
Trigano A, Blandeau O, Dale C, Wong MF, Wiart J. · 2007
Researchers tested cellular phone interference with implantable loop recorders by placing phones 1 cm from externally applied devices in 45 patients. The ILR was positioned in the left parasternal region and the telemetry wand removed after regular programming. They used GSM phones at 900 MHz with 2 W output and PCS phones at 1800 MHz with 1 W output. The artifacts occurred without causing permanent device dysfunction or reprogramming.
Tahvanainen K et al. · 2007
Roosli M, Michel G, Kuehni CE, Spoerri A · 2007
Researchers used Swiss national mortality registry data from 1969 to 2002 to calculate age-standardized brain tumour mortality rates per 100,000 person-years. The study period was split before and after 1987 when analogue mobile technology was introduced. Over the whole period, mortality increased significantly in older age groups (60-74 and 75+ years) but not in younger groups. From 1987 onward, brain tumour mortality rates were relatively stable in all age groups.
Peyman A, Holden SJ, Watts S, Perrott R, Gabriel C · 2007
The dielectric properties of pig cerebrospinal tissues were measured in vivo and in vitro in the frequency range of 50 MHz-20 GHz. White matter and spinal cord showed significant variation as a function of animal age while no age-related variations were recorded for grey matter. The in vitro study included tissue from pigs weighing approximately 10, 50, and 250 kg to examine variation with age. Total combined measurement uncertainty was calculated at each frequency point and reported over representative frequency regions. Comparisons were made between the in vivo and in vitro data and with literature from the past decade.
Panagopoulos DJ et al. · 2007
Researchers used Drosophila melanogaster reproductive capacity to compare the biological activity of GSM 900 MHz and DCS 1800 MHz radiation. Both radiation types significantly reduced reproductive capacity in a non-thermal manner. GSM 900 MHz radiation appeared more bioactive than DCS 1800 MHz, a difference attributed mostly to field intensity and less to carrier frequency.
Panagopoulos DJ, Chavdoula ED, Nezis IP, Margaritis LH · 2007
Researchers used the TUNEL assay to detect DNA fragmentation in early and mid-oogenesis stages of Drosophila melanogaster. Flies were exposed to GSM 900-MHz or DCS 1800-MHz radiation from a mobile phone for a few minutes daily over the first six days of adult life. Both radiation types induced DNA fragmentation in all cell types of the egg chamber, leading to degeneration of egg chambers. Germarium and stages 7-8 were the most sensitive developmental stages, with germarium even more sensitive than stages 7-8.
Lonappan A, Rajasekharan C, Thomas V, Bindu G, Mathew KT. · 2007
Researchers measured the dielectric properties of human colostrum and breast milk at microwave frequencies using a rectangular cavity perturbation technique at the S-band. Dielectric constants of the samples increased as weeks elapsed, attributed to reduced fat content and increased lactose concentration.
Liu XY et al. · 2007
Researchers interviewed 200 women with early spontaneous abortion and age-matched controls and used multivariable logistic regression. In single-factor analysis, higher proportions of watching TV ≥10 hours/week, computer use ≥45 hours/week, using copycat, microwave oven and mobile phone, and proximity to switch rooms ≤50 m and launching towers ≤500 m were found in cases versus controls. After multivariable adjustment, using a microwave oven and mobile phone, exposure to abnormal renovation smell for ≥3 months, emotional stress in early pregnancy, and prior spontaneous abortion remained significantly associated with miscarriage risk. The odds ratios for these risk factors were 2.23 and 4.63.
Landgrebe M et al. · 2007
Researchers measured cortical excitability parameters using transcranial magnetic stimulation in 23 subjectively electrosensitive patients and two control groups totaling 49 participants with varying levels of unspecific health complaints. Electrosensitive patients showed reduced intracortical facilitation compared to both control groups. Motor thresholds and intracortical inhibition were unaffected in electrosensitive patients relative to controls. The authors suggest that altered central nervous system function may account for symptom manifestation in subjectively electrosensitive patients.
Lahkola A et al. · 2007
Researchers conducted a population-based case-control study of 1,522 glioma patients and 3,301 controls. Regular mobile phone use was not associated with increased glioma risk (OR = 0.78, 95% CI: 0.68–0.91). No significant associations were found for duration of use, years since first use, cumulative calls, or cumulative hours, though a linear trend showed a small increase per 100 hours of cumulative use (OR = 1.006 (1.002, 1.010) per 100 hr). For more than 10 years of use on the same side as the tumor, a borderline significant increased odds ratio of 1.39 (95% CI: 1.01–1.92) was observed, while use on the opposite side showed no increase (OR = 0.98, 95% CI: 0.71–1.37).
Krause CM, Pesonen M, Haarala Bjornberg C, Hamalainen H. · 2007
Researchers recruited two groups of 36 male participants each, one performing an auditory memory task and the other a visual working memory task under six exposure conditions. The study aimed to partially replicate earlier work and investigate effects of mobile phone EMF on event-related desynchronisation/synchronisation EEG responses during cognitive processing. EMF exposure produced modest effects on alpha band oscillatory responses but no effects on behavioural measures. The EEG effects were varying, unsystematic, and inconsistent with previous reports.
Hours M et al. · 2007
Cases were histologically confirmed or based on radiological images, and controls were matched for gender, age, and residence, drawn from electoral rolls. Detailed exposure information was collected via face-to-face interviews, and conditional logistic regression estimated odds ratios. Regular cell phone use was not associated with increased risk of neuroma, meningioma, or glioma. A tendency for increased glioma risk was observed among the heaviest users, but the study had limited statistical power and results need verification in the international analysis.
Hardell LO et al. · 2007
Researchers reviewed two cohort studies and 16 case-control studies on cellular phone use and brain tumour risk, focusing on use for 10 or more years and ipsilateral exposure. The cohort study was considered of limited value due to methodological shortcomings, and most case-control results were based on low numbers. Four case-control studies found an association with acoustic neuroma for at least 10 years' use, while six studies reported increased odds ratios for malignant brain tumours, especially for ipsilateral exposure. A meta-analysis found ipsilateral cell phone use for 10 or more years yielded an odds ratio of 2.4 for acoustic neuroma and 2.0 for glioma.
Hansson Mild K, Hardell L, Carlberg M. · 2007
The study presents a pooled analysis of two case-control studies on the association of brain tumours with mobile phone use. Use of analogue cellular phones increased the risk for acoustic neuroma by 5% per 100 hours of use. The risk increased for astrocytoma grade III-IV with latency period, with highest estimates for more than 10 years since first use. Risk increased per year of use for analogue phones by 10%, digital phones by 11%, and cordless phones by 8%. For all studied phone types, odds ratios for brain tumours, mainly acoustic neuroma and malignant brain tumours, increased with latency period, especially for astrocytoma grade III-IV.
Hallberg O. · 2007
Researchers related health parameters to population density in 21 Swedish counties and to estimates of average mobile phone output power. People in sparsely populated counties in Sweden, Denmark, and Norway have suffered more illness and longer recovery since 1997, whereas the countryside was the healthiest place 20 years ago. The strongest correlations with decreased health quality were estimated average mobile phone power output (positive correlation) and GSM base station coverage (negative correlation) in each county.
Ha M, Im H, Lee M, Kim HJ, Kim BC, Gimm YM, Pack JK. · 2007
Researchers selected leukemia and brain cancer patients under age 15 and matched controls from 14 South Korean hospitals using the Medical Insurance Data System. Exposure to RFR from 31 AM transmitters of at least 20 kW was estimated using a GIS-based prediction program calibrated with measurements. The odds ratio for all leukemia was 2.15 for children within 2 km of the nearest transmitter versus those beyond 20 km. For total RFR exposure, lymphocytic leukemia odds ratios were 1.39 and 1.59 in the second and third quartiles versus the lowest, and brain cancer was not associated with AM RFR.
Erdreich LS et al. · 2007
The study's objective was to measure environmental, behavioral, and engineering factors affecting RF power output of GSM mobile phones during operation. They estimated RF-field exposure of volunteers using software-modified phones that recorded output power settings during a 5-day period. The largest factor affecting energy output was study area, followed by user movement and location, hands-free device use, and urbanicity, though the latter two accounted for trivial variance.
English NJ, Mooney DA. · 2007
Clark ML et al. · 2007
Researchers measured estrogen and melatonin metabolites in overnight urine from women living near radio and television transmitters. Among premenopausal women, no associations were found between RF or 60-Hz exposure and either metabolite.
Bornkessel C, Schubert M, Wuschek M, Schmidt P. · 2007
The paper summarizes two studies that developed and applied measurement and calculation methods for public exposure around GSM and UMTS base stations. Measurements showed exposures from 0.01% to more than 10% of field strength limits, with distance not a main factor but orientation and sight conditions greatly influencing exposure. Simulation tools predicted exposure accurately in line-of-sight scenarios but free space models overestimated exposure by orders of magnitude in non-line-of-sight situations.
Barker AT et al. · 2007
Researchers conducted a double-blind study with 120 healthy volunteers who completed six exposure sessions with GSM and TETRA handset signals. They also measured blood catechols before and after exposure, heart rate variability during exposure, and 24-hour ambulatory blood pressure after exposure. The study had power to detect mean arterial pressure changes smaller than 1 mmHg, but no measurement showed any effect attributable to radiofrequency exposure. A single statistically significant decrease of 0.7 mmHg in mean arterial pressure occurred with GSM handsets in sham mode, which the authors suggest may be due to a slight increase in handset operating temperature.
Avdikos A et al. · 2007
The isolated leiomyosarcoma cells were cultured and exposed to a resonant low intensity radiofrequency EMF at frequencies between 10 kHz to 120 kHz for 45 minutes daily over two consecutive days. Three-month-old female Wistar rats were inoculated with leiomyosarcoma cells that had been exposed or not exposed to the EMF. Rats exposed to resonant EMF after tumor appearance (EG-I) showed tumor regression to 66% incidence and had longer survival and slower tumor growth than the other groups.
Arns M, Van Luijtelaar G, Sumich A, Hamilton R, Gordon E. · 2007
Researchers used standardized data from the Brain Resource International Database to examine the relationship between mobile phone usage, personality, and brain function in 300 participants. The findings suggest a subtle slowing of brain activity related to mobile phone use that is not explained by personality differences. These changes are still within normal physiological ranges. Better executive function in mobile phone users may reflect more focused attention, possibly associated with a cognitive training effect from frequently making phone calls in distracting places. Participants were divided into three groups based on the frequency and duration of their mobile phone usage.
