7
Figure 2. Status of Comparability of Results for Both TSH and
fT4
a
–45
–75 –50 –45 –30 –15 0 15
–30 –15
Median deviations (%)
Median deviations (%)
a
As documented in 2017 by the International Federation of Clinical Chemistry and Laboratory
Medicine's Committee of Standardization of yroid Function Tests.
Median deviations for each assay for a panel of ~100 patient samples (serum) with concentrations spread
over the entire measurement interval versus the reference are shown (the black lines and squares; the
15th, 50th, and 85th centiles, the vertical line; reference free thyroxine: candidate reference measurement
procedure based on equilibrium dialysis-isotope dilution-mass spectrometry/reference thyrotropin: all
procedure trimmed mean). For more details, we refer to the original publications: ienpont LM, et al.
Clin Chem 2017;63:1248–1260 and De Grande LAC, et al. Clin Chem 2017;63:1642–1652.
TSH
–
mIU/L
FT4
pmol/L
0.5
–
5
<0.5
<
10
10
–
25
25
–
100
>
100
>
5
0 15
