Table 1

 Median and range of matched samples for testosterone assays by sex and age

nIn house extraction assayBayer ADVIA Centaur direct assayp Value
MedianRangeMedianRange
Values are nmol/l.
*Reference range (within 95% confidence intervals).
**Absolute range (insufficient data to calculate 95% confidence intervals).
Boys
    <10 days362.31.0–11.5*4.02.5–11.1*<0.001
    >10 days424.60.3–29.3*3.50.2–17.2*<0.001
Girls
    <10 days360.70.3–3.6*3.31.7–5.6*<0.001
    >10 days70.50.2–1.3**0.80.1–1.5**Insufficient data