Authors

Parkar MA, Ahmed R, Abdullah BB, Patil BS, Das KK. (2010). Effect of cell phone exposure on physiologic and hematologic parameters of male medical students of Bijapur (Karnataka) with reference to serum lipid profile. J Basic Clin Physiol Pharmacol. 21(2):201-10.

Introduction
Numerous reports have recently been published on potential health effects of radiofrequency electromagnetic radiation (RF-EMR) emitted from mobile phones. Because of immense numbers of mobile phone users, even small adverse effects can have major public health implications. Some studies suggest that RF-EMR may affect physiological parameters regulated by autonomic nervous system. Therefore, further studies are needed to assess effects of mobile phone exposure on these parameters.

Objective
The objectives were 1) to assess potential effects of long-term mobile phone exposure on several physiological and hematological parameters and on serum lipid profile; 2) to compare the effect of acute mobile phone exposure on various physiological parameters among long-term mobile phone users and among non-users.

Methods
Participants were 55 healthy male medical students in Bijapur (Karnataka), India. Group I (n=22) included first-year students (age 20.63±1.17 years) who had never used mobile phones. Group II included 35 final year students (age 22.00±1.56 years) who had been using mobile phones for more than 4 years. All participants were non-smokers and did not drink alcohol. The acute (1-minute) exposure to 900 MHz RF was from an GSM mobile phone Nokia 5310.
 
Results
There were no significant differences between the groups in basal heart rate or systolic blood pressure. Diastolic blood pressure was significantly higher in group II, but in both groups it was within the normal range. There were no significant differences between the groups in hematological parameters (red blood cell and white blood cell counts and hemoglobin). Levels of total cholesterol, very low density lipoprotein cholesterol and triglycerides were significantly higher in group II as compared to group I. There were no significant group differences in levels of high density lipoprotein cholesterol and low density lipoprotein cholesterol. A significant increase in peak heart rate in group II as compared to group I, and a significant decrease in peak oxygen saturation in group I as compared to group II were observed after the acute exposure. It took more time for oxygen saturation to return to basal level in group I than in group II.

Interpretation and Conclusion
Long-term exposure to mobile phones did not appear to have any noticeable impact on most physiologic and hematologic parameters. There was some evidence for alteration of lipid profiles in the long-term mobile phone users. The results from the experiment with acute exposure may “reflect a lesser resistance against stress induced by cell phone exposure” in the control subjects than in the exposed subjects.



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