title: Age-dependent reference intervals for measured bioavailable testosterone on the Siemens Advia Centaur: ethnicity-specific values not necessary for South Asians.
abstract: OBJECTIVE
  To determine reference intervals for bioavailable testosterone for the Siemens Centaur analyzer and to assess the need for ethnicity-specific ranges for total testosterone and/or bioavailable testosterone in South Asians.
  
  
  METHODS
  Testosterone was measured before and after ammonium sulphate precipitation on specimens collected from a small cohort of healthy male South Asians and Europeans.
  
  
  RESULTS
  Inter-ethnicity differences in BioT and TT were not significant. Age-specific BioT reference intervals are reported.
  
  
  CONCLUSIONS
  Ethnicity-specific TT and BioT reference intervals for South Asians do not appear necessary.
authors.affiliation: Department of Pathology and Laboratory Medicine, St. Paul's Hospital and the University of British Columbia, Vancouver, BC, Canada.
authors.forename: Amanda C
authors.initials: AC
authors.lastname: Zimmerman
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Buhr
authors.forename: Scott A
authors.initials: SA
authors.lastname: Lear
authors.forename: Daniel T
authors.initials: DT
authors.lastname: Holmes
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D044466:Asian People; D015331:Cohort Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012015:Reference Standards; D012016:Reference Values; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone