Table 2.
Results obtained with procalcitonin immunoassays compared to BRAHMS PCT Kryptor.
| Values (ng/mL)a | P (Wilcoxon–Mann–Whitney)b | Spearman's correlation (r)b | Deming fitb | Mean bias and 95% CI (ng/mL)b | |
|---|---|---|---|---|---|
| Kryptor | 1.40 (0.35–5.37) | – | – | – | – |
| Liaison | 1.63 (0.32–5.78) | 0.052 | 0.986 (p<0.001) | y=1.02x+0.22 | 0.38 (−0.08 to 0.83) |
| Vidas | 1.95 (0.33–6.40) | <0.001 | 0.979 (p<0.001) | y=1.40x−0.09 | 2.70 (1.55 to 3.86) |
| Cobas E601 | 1.30 (0.30–4.90) | 0.085 | 0.988 (p<0.001) | y=1.12x−0.47 | 0.40 (−0.17 to 0.97) |
| Advia Centaur | 1.35 (0.32–5.11) | 0.001 | 0.984 (p<0.001) | y=0.80x+0.40 | −1.02 (−1.67 to −0.36) |
| Diazyme (Architect) | 1.27 (0.28–4.53) | 0.038 | 0.899 (p<0.001) | y=0.95x−0.16 | −0.51 (−1.07 to 0.06) |
| Diazyme (Advia 2400) | 0.88 (1.15–4.46) | 0.341 | 0.927 (p<0.001) | y=1.01x−0.23 | −0.13 (−0.77 to 0.51) |
| Diazyme (Cobas C501) | 0.90 (0.48–4.38) | 0.004 | 0.899 (p<0.001) | y=0.85x+0.07 | −1.01 (−1.76 to −0.26) |
| Diazyme (AU5800) | 0.82 (0.42–4.82) | 0.002 | 0.899 (p<0.001) | y=0.87x−0.04 | −0.87 (−1.47 to −0.27) |
a
Median and interquartile range.
b
Versus BRAHMS PCT Kryptor.