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Fig. 2 | BMC Research Notes

Fig. 2

From: Clinical laboratory verification of thyroglobulin concentrations in the presence of autoantibodies to thyroglobulin: comparison of EIA, radioimmunoassay and LC MS/MS measurements in an Urban Hospital

Fig. 2

Comparison of Tg measurements in TgAb positive specimens by EIA, RIA, and LC MS/MS methods. a TgAb positive specimens (N = 20), EIA Tg concentrations (0.07–107.9 ng/mL), RIA = 1.5 * EIA + 4.6, r = 0.87, Syx = 19.4. b TgAb positive samples (N = 12), EIA Tg concentrations (0.07–7.55 ng/mL), RIA = 3.9 * EIA + 1.72, r = 0.60, Syx = 7.2. c TgAb positive specimens, N = 20. For EIA Tg concentrations (2.0–112.0 ng/mL), LC MS/MS = 0.89 * RIA − 4.2, r = 0.89, Syx = 14.7. d TgAb positive specimens, N = 12. EIA Tg concentrations (2.0–18.2 ng/mL), LC MS/MS = 0.6 * RIA − 1.4, r = 0.90, Syx = 1.6

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