ID Number		1198
Study Type		Human / Provocation
Model		900 / 1800 MHz (GSM) mobile phone exposure and analysis of headaches, blood pressure, and cardiac pulse rate
Details		Human volunteers (n = 17; self-reported headaches following use of mobile phones) were exposed to 900 MHz (GSM) RF from a dipole antenna at 0.8 W/kg (brain max SAR per 10 grams) for 30 minutes and analyzed for headaches and/or changes in blood pressure and/or cardiac pulse rate using a double blind provocation design. The authors report no statistically significant effect of RF exposure. Further, the subjects tended to believe they were exposed regardless of whether the RF exposure was on or off (i.e., sham). There was also no association with time of day, room temperature, medication, use of a mobile phone that day, or degree of symptoms before exposure. The study is a laboratory follow-on from earlier epidemiologic analysis looking at mobile phone use and headaches & fatigue in Scandanavia. A subsequent study in 2008 also reported on 17 self reported hypersensitive individuals, used the same exposure, and reported no associations. Because the volunteers experienced their typical mobile phone headache under conditions of both RF and sham exposure, the authors conclude the most likely explanation is that the headache in this situation is caused by negative expectations (nocebo)
Findings		No Effects
Status		Completed With Publication
Principal Investigator		Sor-Trondelag University College, Norway - gunnhild.oftedal@aft.hist.no
Funding Agency		Research Council, Norway
Country		NORWAY
References		Stovner, LJ et al. Acta Neurol Scand, (2008) 188:67-71 Oftedal, G et al. Cephalalgia, (2007) 27:447-455
Comments		How does one select individuals that are "self-reported not hypersensitive, but experiencing headaches from mobile phones" ?