Abramson Michael J, Benke Geza P, Dimitriadis Christina, Inyang Imo O, Sim Malcolm R, Wolfe Rory S, Croft Rodney J
Department of Epidemiology & Preventive Medicine, School of Public Health & Preventive Medicine, Monash University, Melbourne, Victoria, Australia.
Bioelectromagnetics. 2009 Dec;30(8):678-86. doi: 10.1002/bem.20534.
As part of the Mobile Radiofrequency Phone Exposed Users' Study (MoRPhEUS), a cross-sectional epidemiological study examined cognitive function in secondary school students. We recruited 317, 7th grade students (144 boys, 173 girls, median age 13 years) from 20 schools around Melbourne, Australia. Participants completed an exposure questionnaire based on the Interphone study, a computerised cognitive test battery, and the Stroop colour-word test. The principal exposure metric was the total number of reported mobile phone voice calls per week. Linear regression models were fitted to cognitive test response times and accuracies. Age, gender, ethnicity, socio-economic status and handedness were fitted as covariates and standard errors were adjusted for clustering by school. The accuracy of working memory was poorer, reaction time for a simple learning task shorter, associative learning response time shorter and accuracy poorer in children reporting more mobile phone voice calls. There were no significant relationships between exposure and signal detection, movement monitoring or estimation. The completion time for Stroop word naming tasks was longer for those reporting more mobile phone voice calls. The findings were similar for total short message service (SMS, also known as text) messages per week, suggesting these cognitive changes were unlikely due to radiofrequency (RF) exposure. Overall, mobile phone use was associated with faster and less accurate responding to higher level cognitive tasks. These behaviours may have been learned through frequent use of a mobile phone.
作为移动射频电话暴露用户研究（MoRPhEUS）的一部分，一项横断面流行病学研究调查了中学生的认知功能。我们从澳大利亚墨尔本周边的20所学校招募了317名七年级学生（144名男生，173名女生，中位年龄13岁）。参与者完成了一份基于国际癌症研究机构（IARC）手机研究的暴露问卷、一套计算机化认知测试以及斯特鲁普颜色-文字测试。主要暴露指标是每周报告的手机语音通话总数。对认知测试的反应时间和准确率进行线性回归模型拟合。将年龄、性别、种族、社会经济地位和用手习惯作为协变量纳入模型，并针对学校聚类调整标准误差。报告手机语音通话较多的儿童，其工作记忆准确率较低，简单学习任务的反应时间较短，联想学习反应时间较短且准确率较低。暴露与信号检测、运动监测或估计之间无显著关系。报告手机语音通话较多的人，其斯特鲁普单词命名任务的完成时间更长。对于每周短信（SMS，也称为文本消息）总数的研究结果相似，这表明这些认知变化不太可能是由射频（RF）暴露导致的。总体而言，手机使用与对更高级认知任务的更快但不太准确的反应有关。这些行为可能是通过频繁使用手机习得的。
