title: The effects of cellular telephone use on serum PSA levels in men.
abstract: BACKGROUND
  The increasing use of cellular telephones is known to have harmful effects on human health. The aim of this prospective study was to determine whether cellular telephone use affected serum PSA levels in men.
  
  
  METHODS
  Participants included 20 men with ages ranging from 22 to 65 years who had never previously used cellular telephones. Blood samples were taken prior to and 30 days after the beginning of cellular telephone use. Serum was separated from the blood samples and stored in a deep freezer until the end of the study, at which time serum free and total PSA levels were determined by tandem radioimmunoassay. The results were statistically analyzed by the Wilcoxon Paired Signed Rank Test.
  
  
  RESULTS
  Average free and total PSA values were 2.070 ng/ml and 0.500 ng/ml before the study, and 2.0 ng/ml and 0.505 ng/ml at the end of the study, respectively. No significant difference was determined between the initial and final values (p > 0.05).
  
  
  CONCLUSIONS
  The results indicate that cellular telephone use does not significantly affect PSA values in the short term. Nevertheless, we think that there is a need for longer-term studies on this subject.
authors.affiliation: School of Medicine, Department of Urology, Dicle University, Diyarbakir, Turkey.
authors.forename: Veli
authors.initials: V
authors.lastname: Simşek
authors.forename: Hayrettin
authors.initials: H
authors.lastname: Sahin
authors.forename: Ali Ferruh
authors.initials: AF
authors.lastname: Akay
authors.forename: Halil
authors.initials: H
authors.lastname: Kaya
authors.forename: Mehmet Kamuran
authors.initials: MK
authors.lastname: Bircan
mesh_terms: D000328:Adult; D000368:Aged; D040421:Cell Phone; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D017430:Prostate-Specific Antigen / Q000097:blood*
chemical_list: D017430:Prostate-Specific Antigen