title: A chromosomal study of workers with long-term exposure to radio-frequency radiation.
abstract: OBJECTIVE
  To examine whether an increased level of chromosome damage occurs in the stimulated lymphocytes of radio-linemen after long-term but intermittent exposure to radio-frequency radiation (RFR) during the course of their work.
  
  
  METHODS
  Chromosome studies were performed on blood samples from 38 radio-linemen matched by age with 38 controls, all of whom were employed by Telecom Australia. The radio-linemen had all worked with RFR in the range 400 kHz-20 GHz with exposures at or below the Australian occupational limits, and the controls were members of the clerical staff who had no exposure to RFR. Two hundred metaphases from each subject were studied and chromosome damage was scored by an observer who was blind to the status of the subjects.
  
  
  RESULTS
  The ratio of the rate of aberrant cells in the radio-linemen group to that in the control group was 1.0 (95% confidence interval, 0.8-1.3). There were no statistically significant differences in the types of aberrations that were scored.
  
  
  CONCLUSIONS
  Exposure to RFR at or below the described limits did not appear to cause any increase in chromosomal damage in circulating lymphocytes.
authors.affiliation: Department of Cytogenetics, St Vincent's Hospital, Fitzroy, Vic.
authors.forename: O M
authors.initials: OM
authors.lastname: Garson
authors.forename: T L
authors.initials: TL
authors.lastname: McRobert
authors.forename: L J
authors.initials: LJ
authors.lastname: Campbell
authors.forename: B A
authors.initials: BA
authors.lastname: Hocking
authors.forename: I
authors.initials: I
authors.lastname: Gordon
mesh_terms: D002869:Chromosome Aberrations; D002875:Chromosomes / Q000528:radiation effects*; D006801:Humans; D008214:Lymphocytes / Q000648:ultrastructure; D008452:Maximum Allowable Concentration; D016273:Occupational Exposure; D011846:Radio Waves / Q000009:adverse effects*; D013997:Time Factors