Table 2. Inter-examiner reliability values obtained with different methods of plaque quantification.
| Cohen's Kappa (SE) | Weighted Kappa (SE) | ICC (95 % CI) | |
|---|---|---|---|
| Silness & Loe | 0.625 (0.127) | 0.664 (0.160) | |
| Turesky | 0.621 (0.118) | 0.780 (0.106) | |
| Ekstrand | 0.624 (0.128) | 0.646 (0.163) | |
| FC + Turesky | 0.248 (0.112) | 0.513 (0.159) | |
| FC + disclosing + Turesky | 0.127 (0.097) | 0.633 (0.155) | |
| FC | 0.247 (0.100) * | 0.654 (0.156) * | 0.700 |
| (0.526 - 0.819) | |||
| FC + disclosing | 0.481 (0.102) * | 0.785 (0.165) * | 0.881 |
| (0.794 - 0.933) | |||
| Photographic images | 0.348 (0.103) * | 0.592 (0.160) * | 0.764 |
| (0.600 - 0.867) |
*
Calculated after division into a 5-score scale according to the quintiles. ICC= intraclass correlation coefficient; FC = Fluorescence camera; SE = Standard error; CI = Confidence interval.