Table 2: Technique concordance by observer. Partial Discordance = an observer giving a one-grade difference between the two techniques. Complete discordance = a two point grade difference between the two techniques. Concordance = exact grading agreement for both techniques. Cohen's linear kappa interpretation: almost perfect (0.81 - 1.0), substantial agreement (0.61 - 0.80), moderate agreement (0.41 - 0.60).
Technique concordance by observer | |||||||
Reader | Partial discordance | Complete discordance | Concordance | Cohen's linear kappa | Max possible | Std. error | Actual as proportion of max |
1 | 3/27 11 % |
0/27 | 24/27 89% |
0.8625 | 0.9592 | 0.0766 | 0.9039 |
2 | 6/27 22% |
1/27 4 % |
20/27 74% |
0.616 | 0.957 | 0.123 | 0.643 |
3 | 8/27 30 % |
1/27 4 % |
18/27 67 % |
0.583 | 0.917 | 0.121 | 0.636 |
Total | 17/81 21% |
2/81 2% |
66/81 76% |
- | - | - | - |