Hiwa Hossaini - Department of Environmental Health Engineering, Faculty of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
Faranak Khodadoost - Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
Soma Goftari - Corresponding author: Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran

Background: This study aimed to assess the specific absorption rate (SAR) due to the exposure to the radiations from different brands of cellphones, and to compare it with guideline values. The SAR is calculated using the mathematic equation based on the measured energy. Methods: In this regard, ۲۰۴ cellphones from different brands were randomly surveyed. A questionnaire composed of demographic and self-reported questions was designed to survey the students’ awareness and attitude about cellphone brands, usage duration and observed health effects. The Kolmogorov-Smirnov test was used for statistical analysis at frequencies of ۹۰۰ and ۱۸۰۰ MHz and the differences between brands were assessed by the Kruskal-Wallis test. Results: According to the results, it was found that ۴۶.۷% and ۸.۴% of people used cellphones for less than ۴ and more than ۱۲ hours per day, respectively. According to the statistical tests, students with higher talk time, sent messages, and Internet usage, and those using wireless hands-free, had the most reported symptoms of headache, tinnitus, eye burning and eyestrain, sleep disturbances, and skin color changes. Conclusion: The authors found that there was no significant difference between different brands based on the SAR values. However, Samsung and Nokia brands had the highest SAR values and ASUS brand had the lowest ones. Also, the type of game apps (online/offline) was significantly correlated with possible health effects. Therefore, regarding these cases, as well as the fact that many dangers of cellphone use are unknown, it is recommended to use cellphones cautiously.

Cell phone, Students, Electromagnetic fields, Attention, Humans