Age-dependent reference intervals for measured bioavailable testosterone on the Siemens Advia Centaur: ethnicity-specific values not necessary for South Asians.
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.
Zimmerman
Amanda C
AC
Department of Pathology and Laboratory Medicine, St. Paul's Hospital and the University of British Columbia, Vancouver, BC, Canada.
Buhr
Kevin A
KA
Lear
Scott A
SA
Holmes
Daniel T
DT
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*
D013739:Testosterone