TABLE 2.
Agreement between tests as measured by the Kappa coefficient
| Tests compared | Kappa coefficient (95% CI) for:
|
|||||
|---|---|---|---|---|---|---|
| SS-A | SS-B | RNP | Sm | Jo-1 | Scl-70 | |
| CIEP vs SPD | 0.72 (0.53–0.91) | 0.90 (0.70–1.00) | 0.78 (0.58–0.99) | NDa | ND | ND |
| CIEP vs LIA | 0.65 (0.44–0.86) | 0.56 (0.26–0.86) | 0.68 (0.41–0.95) | ND | ND | ND |
| CIEP vs ELISA | 0.44 (0.19–0.70) | 0.50 (0.18–0.82) | 0.42 (0.16–0.67) | ND | ND | ND |
| SPD vs LIA | 0.61 (0.40–0.83) | 0.48 (0.15–0.81) | 0.58 (0.30–0.87) | ND | ND | ND |
| SPD vs ELISA | 0.48 (0.23–0.73) | 0.51 (0.18–0.85) | 0.33 (0.06–0.60) | ND | ND | ND |
| LIA vs ELISA | 0.43 (0.17–0.69) | 0.66 (0.41–0.91) | 0.30 (0.04–0.57) | ND | ND | ND |
a
ND, not done because numbers were too small.