Table 4.
Pearson's correlation coefficient (r), intraclass correlation coefficient (ICC), and coefficient of variation (CV) for average and sectoral peripapillary retinal nerve fiber layer (pRNFL) thickness measurements at the first and second visits in groups W and N.
| Group W (Weiss ring [ +]) | Group N (Weiss ring [ −]) | p value† | ||||||
|---|---|---|---|---|---|---|---|---|
| r (95% CI)* | ICC (95% CI)* | CV | r (95% CI)* | ICC (95% CI)* | CV | |||
| Average pRNFL | 0.866 (0.752–0.927) | 0.927 (0.857–0.963) | 3.64 | 0.949 (0.836–0.979) | 0.973 (0.947–0.987) | 1.99 | 0.004 | |
| Superior pRNFL | 0.879 (0.745–0.950) | 0.935 (0.872–0.957) | 3.77 | 0.906 (0.810–0.957) | 0.950 (0.902–0.975) | 3.31 | 0.537 | |
| Temporal pRNFL | 0.865 (0.713–0.967) | 0.924 (0.851–0.961) | 4.93 | 0.931 (0.894–0.969) | 0.964 (0.930–0.982) | 2.86 | 0.052 | |
| Inferior pRNFL | 0.597 (0.277–0.821) | 0.744 (0.497–0.869) | 10.15 | 0.951 (0.865–0.978) | 0.974 (0.949–0.987) | 2.66 | < 0.001 | |
| Nasal pRNFL | 0.604 (0.262–0.829) | 0.749 (0.508–0.872) | 7.75 | 0.848 (0.695–0.922) | 0.917(0.835–0.958) | 4.91 | 0.062 | |
*All p values < 0.01 for Pearson’s correlation coefficient (r) and ICC.
†p value for the difference in CV between groups W and N.
CI confidence interval.
Significant values are in bold.