title: No association between the use of cellular or cordless telephones and salivary gland tumours.
abstract: OBJECTIVE
  To investigate the association between the use of cellular or cordless telephones and the risk for salivary gland tumours.
  
  
  METHODS
  Cases were assessed from the six regional cancer registries in Sweden. Four controls matched for sex and age in five year age groups were selected for each case. A total of 293 living cases and 1172 controls were included.
  
  
  RESULTS
  There were 267 (91%) participating cases and 1053 (90%) controls. Overall no significantly increased risk was found. Odds ratios were 0.92 (95% CI 0.58 to 1.44) for use of analogue phones, 1.01 (95% CI 0.68 to 1.50) for use of digital phones, and 0.99 (95% CI 0.68 to 1.43) for use of cordless phones. Similar results were found for different salivary gland localisations. No effect of tumour induction period or latency was seen, although few subjects reported use for more than 10 years.
  
  
  CONCLUSIONS
  No association between the use of cellular or cordless phones and salivary gland tumours was found, although this study does not permit conclusions for long term heavy use.
authors.affiliation: Department of Oncology, University Hospital, SE-701 85 Orebro, Sweden. lennart.hardell@orebroll.se
authors.forename: L
authors.initials: L
authors.lastname: Hardell
authors.forename: A
authors.initials: A
authors.lastname: Hallquist
authors.forename: K
authors.initials: K
authors.lastname: Hansson Mild
authors.forename: M
authors.initials: M
authors.lastname: Carlberg
authors.forename: H
authors.initials: H
authors.lastname: Gertzén
authors.forename: E-B
authors.initials: EB
authors.lastname: Schildt
authors.forename: A
authors.initials: A
authors.lastname: Dahlqvist
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D040421:Cell Phone; D016001:Confidence Intervals; D004781:Environmental Exposure / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008872:Microwaves / Q000009:adverse effects; D008875:Middle Aged; D016017:Odds Ratio; D010307:Parotid Neoplasms / Q000209:etiology / Q000473:pathology; D012307:Risk Factors; D012468:Salivary Gland Neoplasms / Q000209:etiology* / Q000473:pathology; D013365:Submandibular Gland Neoplasms / Q000209:etiology / Q000473:pathology; D013689:Telephone; D013997:Time Factors