Table 4.
ICC (95% CI) | Mean difference | Bland-Altman 95% LOA | P* | |
---|---|---|---|---|
Intra-grader** | 0.98 (0.98–0.99) | 0.08 | -1.29,1.45 | 0.116 |
Inter-grader*** | 0.97 (0.97–0.98) | 0.92 | -0.96,2.80 | 0.194 |
P value of one-sample t-test (comparing between mean difference and zero value) to indicate presence of systemic bias.
Mean difference was determined from 1st time measurement minus 2nd time measurement.
Mean difference was determined from 1st grader measurement minus 2nd grader measurement. CI - confidence interval; ICC - intraclass correlation coefficient; LOA - limits of agreement. Intragrader and intergrader variability and agreement were evaluated using absolute agreement model of ICC and Bland–Altman plot analyses