ID Number		1905
Study Type		Human / Provocation
Model		1900 MHz (CDMA) exposure to self reported hypersensitive and non-hypersensitive adults and teenagers and analysis of subjective symptoms and cardiovascular function.
Details		Self reported hypersensitive volunteers (n=8 male, 10 female) and non-hypersensitive controls (n = 10 male, 9 female) were exposed to a 1900 MHz (CDMA) RF using a handset set at constant power (300 mW) to the left side of the head. Subjects recieved no exposure during the first 15 minutes, were evaluated, exposed over the next 30 minutes, evaluated after 15 and 30 minutes of exposure, recieved no exposure over the last 15 minutes, and were evaluated at the end. Evaluations involved questionnaire of symptomes (redness, itching, throbbing, burning, fatigue, headache, dizziness, nausea, palpitation, and indigestion) and physiological measurements (heart rate, respiration). The authors report no effect of RF exposure and no ability of either hypersensitive or non-hypersensitive to tell when exposure was on. In a related study, the authors exposed non-hypersensitive adults and teenagers to 1900 MHz(CDMA) mobile phone signals and reported no effects on systolic and diastolic blood pressures, heart rate, or respiration rate. The authors did report a decreased skin resistance in the teenage group (p < 0.0001) and adult male subjects (p = .0026) but the effect was transient. A follow-on study exposed self reported hypersensitive (n =18) and non-hypersensitive (n = 19) volunteers to 848-MHz (CDMA) mobile phone signals for 30 minutes at a maximal SAR of 1.22 W/kg using a modified mobile phone handset on 2 separate testing days and reported no evidence of either group being able to perceive when the test transmitter was on. AUTHORS' ABSTRACT: Kwon et al. 2012 (IEEE #5487):concerning the possible health effects of radio frequency-electromagnetic fields (RF-EMFs) emitted by wideband code division multiple access (WCDMA) mobile phones in humans. The number of people with self-reported electromagnetic hypersensitivity (EHS), who complain of various subjective symptoms such as headache, dizziness and fatigue, has also increased. However, the origins of EHS remain unclear. Methods: In this double-blind study, two volunteer groups of 17 EHS and 20 non-EHS subjects were simultaneously investigated for physiological changes (heart rate, heart rate variability, and respiration rate), eight subjective symptoms, and perception of RF-EMFs during real and sham exposure sessions. Experiments were conducted using a dummy phone containing a WCDMA module (average power, 24 dBm at 1950 MHz; specific absorption rate, 1.57 W/kg) within a headset placed on the head for 32 min. Results: WCDMA RF-EMFs generated no physiological changes or subjective symptoms in either group. There was no evidence that EHS subjects perceived RF-EMFs better than non-EHS subjects. Conclusions: Considering the analyzed physiological data, the subjective symptoms surveyed, and the percentages of those who believed they were being exposed, 32 min of RF radiation emitted by WCDMA mobile phones demonstrated no effects in either EHS or non-EHS subjects.
Findings		No Effects
Status		Completed With Publication
Principal Investigator		Yonsei University, Seoul, Korea
Funding Agency		KORSEF, Korea
Country		KOREA, REPUBLIC OF
References		Nam, KC et al. Bioelectromagnetics., (2009) 30:641-650 Kim, DW et al. Conf Proc IEEE Eng Med Biol Soc, (2008) 1:2322-2325 Kwon , MK et al. Environmental Health., (2012) 11:69-(8 pages) Choi, SB et al. BMC Public Health., (2014) 14:438-
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