Table 3.
Kappa concordance between assays
| Beckman | Roche | Siemens | OCD | cPass | |
|---|---|---|---|---|---|
| All days | |||||
| Abbott | 0.929 (0.900–0.960) <0.001 |
0.938 (0.904–0.972) <0.001 |
0.934 (0.899–0.909) <0.001 |
0.912 (0.870–0.953) <0.001 |
0.923 (0.884–0.961) <0.001 |
| Beckman | 0.936 (0.907–0.965) <0.001 |
0.951 (0.925–0.976) <0.001 |
0.921 (0.889–0.954) <0.001 |
0.925 (0.894–0.957) <0.001 |
|
| Roche | 0.948 (0.917–0.979) <0.001 |
0.916 (0.876–0.956) <0.001 |
0.927 (0.890–0.965) <0.001 |
||
| Siemens | 0.921 (0.883–0.961) <0.001 |
0.942 (0.909–0.975) <0.001 |
|||
| OCD | 0.930 (0.893–0.967) <0.001 |
||||
| Days 1–6 | |||||
| Abbott | 0.906 (0.835–0.976) <0.001 |
0.925 (0.856–0.994) <0.001 |
0.939 (0.877–1.0) <0.001 |
0.904 (0.823–0.985) <0.001 |
0.925 (0.856–0.994) <0.001 |
| Beckman | 0.919 (0.853–0.984) <0.001 |
0.946 (0.892–1.0) <0.001 |
0.918 (0.851–0.984) <0.001 |
0.905 (0.835–0.976) <0.001 |
|
| Roche | 0.954 (0.899–1.0) <0.001 |
0.919 (0.844–0.993) <0.001 |
0.908 (0.831–0.986) <0.001 |
||
| Siemens | 0.934 (0.868–1.0) <0.001 |
0.954 (0.899–1.0) <0.001 |
|||
| OCD | 0.887 (0.798–0.975) <0.001 |
||||
| Days 7–13 | |||||
| Abbott | 0.774 (0.613–0.935) <0.001 |
0.742 (0.516–0.969) <0.001 |
0.647 (0.388–0.908) <0.001 |
0.568 (0.290–0.846) <0.001 |
0.626 (0.362–0.890) <0.001 |
| Beckman | 0.775 (0.614–0.935) <0.001 |
0.840 (0.701–0.979) <0.001 |
0.673 (0.488–0.857) <0.001 |
0.740 (0.570–0.910) <0.001 |
|
| Roche | 0.702 (0.461–0.943) <0.001 |
0.515 (0.225–0.805) <0.001 |
0.681 (0.433–0.929) <0.001 |
||
| Siemens | 0.519 (0.229–0.810) <0.001 |
0.687 (0.441–0.933) <0.001 |
|||
| OCD | 0.731 (0.500–0.961) <0.001 |
||||
| Days 14–20 | |||||
| Abbott | 0.913 (0.788–1.0) <0.001 |
0.950 (0.843–1.0) <0.001 |
0.946 (0.831–1.0) <0.001 |
0.950 (0.843–1.0) <0.001 |
1.0 (0.868–1.0) <0.001 |
| Beckman | 0.872 (0.721–1.0) <0.001 |
0.870 (0.717–1.0) <0.001 |
0.872 (0.721–1.0) <0.001 |
0.914 (0.788–1.0) <0.001 |
|
| Roche | 0.896 (0.737–1.0) <0.001 |
0.903 (0.755–1.0) <0.001 |
0.950 (0.843–1.0) <0.001 |
||
| Siemens | 0.896 (0.737–1.0) <0.001 |
0.946 (0.831–1.0) <0.001 |
|||
| OCD | 0.950 (0.843–1.0) <0.001 |
||||
| Days ≥21 | |||||
| Abbott | 0.885 (0.749–1.0) <0.001 |
0.913 (0.783–1.0) <0.001 |
0.913 (0.783–1.0) <0.001 |
0.874 (0.717–1.0) <0.001 |
0.837 (0.660–1.0) <0.001 |
| Beckman | 0.963 (0.881–1.0) <0.001 |
0.963 (0.881–1.0) <0.001 |
0.927 (0.819–1.0) <0.001 |
0.892 (0.763–1.0) <0.001 |
|
| Roche | 1.0 (0.884–1.0) <0.001 |
0.961 (0.787–1.0) <0.001 |
0.924 (0.809–1.0) <0.001 |
||
| Siemens | 0.961 (0.787–1.0) <0.001 |
0.924 (0.809–1.0) <0.001 |
|||
| OCD | 0.963 (0.885–1.0) <0.001 |
||||
Values are kappa (95% CI), p value.