Studienbewertung: Zwei Maßstäbe, ein Problem (Elektrosensibilität)

Doris , Donnerstag, 05.11.2009, 23:42 (vor 5470 Tagen) @ H. Lamarr

Lange Rede kurzer Sinn: Haben Sie Zugang zu den Immissionswerten, oder hat Rea diese womöglich gar nicht genannt?

Doch, es gibt eine Review-Studie von Patrick Levallois aus dem Jahre 2002 und da steht zu der Arbeit von Rea

Very few studies were done on subjects with a more general syndrome. Rea et al. (30) presented the results of a study that they labeled preliminary. One hundred patients treated for some type of environmental sensitivity (the authors briefly mentioned they had been previously evaluated and treated for biological inhalant, food, and chemical sensitivities) and who complained of being EMF sensitive were evaluated in a single-blind screening. They were challenged for 3 min at different frequencies from 0.5 Hz to 5 MHz. The mean intensity of the fields was presented as approximately 2,900 nT at floor level and 350 nT at the level of the chair in which the patient sat while being exposed. The imprecision of the exposure measurements and the adequacy of the exposure settings were settled in a letter to the editor from Bergqvist and Franzén (31). Of the 100 patients first challenged, 25 reacted positively to exposure, with only one reaction to exposure to a placebo. These 25 were compared with 25 healthy volunteers for a double-blind challenge. No detail was given on those volunteers or on the double-blind setting. Of the 25 hypersensitive patients, 16 (64%) reacted positively, the majority (53%) reacting to exposure compared with a few (7.5%) who reacted to a blank challenge. In fact, most of the results presented are incomplete, and it was stated that no reaction to any challenge, active or placebo, was found in the volunteer group. The major symptoms reported by the patients tested were mainly neurological, cardiological, and respiratory. In fact, many of the data are imprecise; therefore, it is difficult to give credence to these results. The same group tried to reproduce these results with an improved design but without success (3,32).