title: Effects of RF exposure of teenagers and adults by CDMA cellular phones.
abstract: Many cellular phone provocation studies have been conducted since the question of increased health risk from extended usage of cellular phones became a social issue. Internationally, most studies have been conducted regarding the effects of GSM cellular phones on blood pressure and heart rate of adult volunteers. On the other hand, very few provocation studies have been conducted regarding the physiological effects of CDMA phones on teenagers. In this study, two volunteer groups consisting of 21 teenagers and 21 adults were exposed to 300 mW of radio frequency (RF) electromagnetic field emitted by a CDMA cellular phone for half an hour. Physiological parameters such as systolic and diastolic blood pressures, heart rate, respiration rate, and skin resistance were simultaneously measured. All the parameters for both groups were unaffected during the exposure except for decreased skin resistance of the teenager group (P < .0001). For the regrouped 23 male and 19 female subjects, all the parameters for both groups were unaffected during the exposure except for decreased skin resistance of the male subjects (P = .0026). Those resistances at 10 min after the terminated exposure returned to the resistances at rest regardless of the different groups of age and sex.
authors.affiliation: Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Ki Chang
authors.initials: KC
authors.lastname: Nam
authors.forename: Sung Woo
authors.initials: SW
authors.lastname: Kim
authors.forename: Soo Chan
authors.initials: SC
authors.lastname: Kim
authors.forename: Deok Won
authors.initials: DW
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D001794:Blood Pressure / Q000528:radiation effects; D040421:Cell Phone; D004311:Double-Blind Method; D005260:Female; D005385:Fingers / Q000098:blood supply; D005712:Galvanic Skin Response / Q000528:radiation effects*; D006339:Heart Rate / Q000528:radiation effects; D006801:Humans; D008297:Male; D017156:Photoplethysmography; D011846:Radio Waves; D012039:Regional Blood Flow / Q000528:radiation effects