Table 4. Percent of correct identification of stage of periodontal disease by visual assessment as compared to the reference standard as well as the percent incorrectly identified as absence of disease (Stage 0) or reversible inflammation without loss of bone (Stage I).
| Stage | nVA | nRS | nagree | % Correct | Kappa (95% CI) | PI | % 0 or I by VA |
|---|---|---|---|---|---|---|---|
| 0 | 5 | 12 | 2 | 16.67 | 0.17 (-0.10, 0.44) | 0.81 | 58.33 (n = 7) |
| I | 21 | 21 | 9 | 42.86 | 0.25 (0.02, 0.48) | 0.53 | 52.38 (n = 11) |
| II | 25 | 16 | 5 | 31.25 | 0.03 (-0.17, 0.24) | 0.54 | 25.00 (n = 4) |
| III | 25 | 20 | 10 | 50.00 | 0.26 (0.04, 0.48) | 0.25 | 10.00 (n = 2) |
| IV | 13 | 20 | 11 | 55.00 | 0.59 (0.38, 0.81) | 0.63 | 10.00 (n = 2) |