Subjective symptoms among mobile phone users--a consequence of absorption of radiofrequency fields?
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Date
2003-04-01
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Abstract
In a previous epidemiological study where we studied the prevalence of subjective symptoms among mobile phone MP users we found as an interesting side finding that the prevalence of many of the subjective symptoms increased with increasing calling time and number of calls per day In this extrapolative study we have selected 2402 people from the epidemiological study who used any of the four most common GSM MP We used the information about the prevalence of symptoms calling time per day and number of calls per day and combined it with measurements of the Specific Absorption Rate SAR We defined three volumes in the head and measured the maximum SAR averaged over a cube of 1 g tissue SAR 1g in each volume Two new exposure parameters Specific Absorption per Day SAD and Specific Absorption per Call SAC have been devised and are obtained as combinations of SAR calling time per day and number of calls per day respectively The results indicates that SAR values 0 5 W kg may be an important factor for the prevalence of some of the symptoms especially in combination with long calling times per day