SYMPTOMS EXPERIENCED BY USERS OF DIGITAL CELLULAR PHONES: A STUDY OF A FRENCH ENGINEERING SCHOOL

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Abstract
A survey study, using a questionnaire, was conducted in 161 students and workers in a French engineering school on symptoms experienced during use of digital cellular phones. A significant increase in concentration difficulties (p<.05) was reported by users of 1800-MHz (DCS) cellular phones compared to users of 900-MHz (GSM) cellular phones. In users of cellular phones, women significantly (p<.05) complained more often of sleep disturbance than men. The use of both cellular phones and VDT significantly (p<.05) increased concentration difficulties. Digital cellular phone users also significantly (p<.05) more often complained of discomfort, warmth, and pricking of the ear during phone conversations as a function of calling duration per day and number of calls per day.