Table 2.
Interdevice reliability of thromboelastograph parameters between two TEG6S devices.
| Parameter | Lin’s Concordance Coefficient (95% CI) | Reduced Major Axis Intercept | Slope |
|---|---|---|---|
| CK R time | 0.96 (0.93–0.99) | 0.57 | 0.88 |
| CK K time | 0.93 (0.87–0.98) | 0.01 | 1.07 |
| CK alpha | 0.87 (0.78–0.96) | −14.10 | 1.20 |
| CK MA | 0.99 (0.98–1.00) | −1.38 | 1.03 |
| CK LY30 | 0.89 (0.82–0.97) | 0.07 | 1.20 |
| HK R time | 0.95 (0.92–0.99) | 0.33 | 0.94 |
| HK K time | 0.99 (0.98–1.00) | 0.04 | 0.99 |
| HK alpha | 0.95 (0.91–0.99) | −9.90 | 1.13 |
| HK MA | 1.00 (0.99–1.00) | 0.19 | 1.00 |
| RT R time | 0.94 (0.89–0.99) | −0.03 | 0.95 |
| RT K time | 1.00 (1.00–1.00) | 0.03 | 0.95 |
| RT alpha angle | 0.99 (0.99–1.00) | 2.00 | 0.98 |
| RT MA | 1.00 (1.00–1.00) | 0.32 | 1.00 |
| RT LY30 | 0.95 (0.92–0.98) | 0.02 | 0.79 |
| RT ACT | 0.96 (0.93–0.99) | −2.96 | 0.94 |
| FF MA | 0.99 (0.98–1.00) | −0.55 | 1.06 |
| FF FLEV | 0.99 (0.98–1.00) | −13.60 | 1.07 |
Abbreviations: CK: standard kaolin; HK: standard kaolin with heparinase; RT: rapid thromboelastograph; R: reaction; K: kinetic; MA: maximum amplitude, LY: amplitude at 30 minutes; ACT: activated clotting time; FF: functional fibrinogen; FLEV: functional fibrinogen level. Reduced major axis slope different to 1 is indicative of the presence of proportional bias; the combination of the slope close to 1 and intercept different from 0 is indicative of the presence of fixed bias.