Matrix-related biases for FSPs based on the different assays
Analyte | Assay pair (x–y) | Bias (%bias) | ||||
---|---|---|---|---|---|---|
FSP1 | FSP2 | FSP3 | FSP4 | FSP5 | ||
Alpha-fetoprotein | Roche-Abbott | 2.60 (1.55) | 10.18 (7.63) | 5.33 (5.77) | –8.45 (–18.06) | 6.78 (27.42) |
Roche-Siemens | 6.60 (3.99) | 5.67 (4.32) | 2.76 (3.08) | –10.09 (–23.11) | 4.73 (22.09) | |
Roche-Beckman | 0.25 (0.14) | 7.65 (5.25) | –0.89 (–0.93) | –15.47 (–37.34) | –5.62 (–37.71) | |
Abbott-Siemens | 3.96 (2.43) | –4.65 (–3.84) | –2.68 (–3.18) | –1.63 (–3.13) | –2.22 (–15.37) | |
Abbott-Beckman | –2.88 (–1.57) | –4.59 (–3.44) | –7.29 (–8.11) | –5.27 (–10.21) | –13.74 (–203.21) | |
Siemens-Beckman | –7.57 (–4.23) | 1.03 (0.74) | –3.95 (–4.23) | –3.13 (–5.81) | –10.83 (–112.00) | |
Carcinoembryonic antigen | Roche-Abbott | 0.73 (2.01) | 3.41 (17.76) | 0.97 (6.55) | 0.47 (4.70) | 0.95 (21.72) |
Roche-Siemens | 3.52 (14.49) | 2.49 (20.03) | 1.35 (14.47) | 0.62 (10.37) | –0.90 (–44.9) | |
Roche-Beckman | 4.38 (10.97) | 2.64 (12.57) | 2.77 (17.17) | 2.50 (23.17) | 0.54 (12.17) | |
Abbott-Siemens | 3.11 (13.02) | 0.38 (3.65) | 0.97 (10.85) | 0.63 (10.56) | –1.17 (–67.38) | |
Abbott-Beckman | 3.43 (8.79) | –1.57 (–9.35) | 1.26 (8.62) | 1.49 (15.28) | –1.08 (–38.43) | |
Siemens-Beckman | –0.75 (–2.14) | –0.36 (–2.00) | 1.66 (11.05) | 2.67 (24.38) | 3.24 (45.38) | |
Prostate-specific antigen | Roche-Abbott | 5.43 (5.31) | –0.33 (–0.46) | 0.39 (0.85) | 1.35 (5.21) | 0.19 (1.63) |
Roche-Siemens | –2.54 (–3.02) | –1.94 (–3.33) | –1.42 (–3.73) | 0.02 (0.07) | 0.02 (0.15) | |
Roche-Beckman | 0.58 (0.45) | 8.17 (9.22) | –4.14 (–7.19) | 3.28 (10.11) | 1.02 (6.83) | |
Abbott-Siemens | –6.97 (–8.75) | –1.66 (–2.84) | –1.73 (–4.59) | –1.08 (–5.28) | –0.15 (–1.45) | |
Abbott-Beckman | –6.24 (–5.13) | 8.59 (9.64) | –4.63 (–8.11) | 1.59 (5.18) | 0.78 (5.29) | |
Siemens-Beckman | 4.47 (3.38) | 11.14 (12.15) | –1.97 (–3.30) | 3.26 (10.04) | 1.00 (6.71) |
Abbreviation: FSP, frozen human serum pools