Table 5.
Mean difference, 95% LoA, and CR analyzed using the Bland-Altman plot in corneal disease eyes
| Sector | Mean difference (μm) | 95% LoA (μm) | CR (μm) | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
|||||||
| Pair 1 | Pair 2 | Pair 3 | Pair 1 | Pair 2 | Pair 3 | Pair 1 | Pair 2 | Pair 3 | |
| 0–2 mm | −0.10 | −0.07 | 0.17 | −5.778 to 5.570 | −3.606 to 3.474 | −5.845 to 6.185 | 5.674 | 3.540 | 6.015 |
| 2–5 mm | |||||||||
| S | 0.22 | −0.35 | 0.13 | −6.207 to 6.641 | −5.678 to 4.980 | −6.433 to 6.698 | 6.424 | 5.329 | 6.565 |
| SN | −0.08 | −0.14 | 0.23 | −5.442 to 5.272 | −5.306 to 5.023 | −4.880 to 5.332 | 5.357 | 5.164 | 5.106 |
| N | −0.18 | −0.01 | 0.19 | −5.317 to 4.959 | −5.543 to 5.524 | −4.880 to 5.257 | 5.138 | 5.534 | 5.069 |
| IN | −0.21 | −0.31 | 0.52 | −5.716 to 5.301 | −6.246 to 5.624 | −5.774 to 6.812 | 5.509 | 5.935 | 6.293 |
| I | 0.09 | −0.21 | 0.11 | −6.687 to 6.876 | −6.474 to 6.059 | −6.906 to 7.132 | 6.782 | 6.267 | 7.019 |
| IT | 0.26 | −0.03 | −0.24 | −7.436 to 7.964 | −5.078 to 5.021 | −7.808 to 7.336 | 7.700 | 5.050 | 7.572 |
| T | −0.25 | −0.12 | 0.37 | −6.553 to 6.063 | −5.289 to 5.043 | −5.474 to 6.209 | 6.308 | 5.166 | 5.841 |
| ST | 0.07 | −0.21 | 0.14 | −6.169 to 6.301 | −6.358 to 5.939 | −5.670 to 5.956 | 6.235 | 6.148 | 5.813 |
| 5–7 mm | |||||||||
| S | −0.09 | −0.03 | −0.23 | −7.263 to 7.093 | −7.400 to 7.338 | −7.509 to 7.057 | 7.178 | 7.369 | 7.283 |
| SN | 0.01 | 0.20 | −0.23 | −6.750 to 6.769 | −5.892 to 6.292 | −6.877 to 6.420 | 6.759 | 6.092 | 6.648 |
| N | −0.02 | −0.22 | 0.24 | −5.395 to 5.357 | −5.124 to 4.690 | −4.415 to 4.886 | 5.376 | 4.907 | 4.650 |
| IN | −0.24 | −0.15 | 0.39 | −7.562 to 7.091 | −6.348 to 6.046 | −7.975 to 8.749 | 7.326 | 6.197 | 8.362 |
| I | 0.36 | −0.27 | 0.02 | −7.011 to 7.737 | −7.778 to 7.229 | −7.462 to 7.500 | 7.374 | 7.504 | 7.481 |
| IT | 0.06 | 0.21 | −0.23 | −9.087 to 9.201 | −7.126 to 7.549 | −8.163 to 7.706 | 9.144 | 7.337 | 7.935 |
| T | −0.07 | −0.03 | 0.09 | −7.116 to 6.984 | −6.398 to 6.341 | −7.142 to 7.330 | 7.050 | 6.370 | 7.236 |
| ST | −0.08 | −0.52 | 0.44 | −6.443 to 6.291 | −7.530 to 6.492 | −6.650 to 7.523 | 6.367 | 7.011 | 7.086 |
| 7–9 mm | |||||||||
| S | 0.32 | 0.13 | 0.28 | −7.428 to 8.072 | −6.281 to 6.531 | −7.803 to 8.369 | 7.750 | 6.406 | 8.086 |
| SN | −0.02 | 0.24 | −0.56 | −8.111 to 8.063 | −8.796 to 9.284 | −13.453 to 12.331 | 8.087 | 9.040 | 12.892 |
| N | −0.27 | 0.01 | 0.31 | −8.202 to 7.668 | −5.992 to 6.011 | −6.317 to 6.939 | 7.935 | 6.001 | 6.628 |
| IN | 0.16 | −0.13 | −0.13 | −11.488 to 11.818 | −11.994 to 11.726 | −12.810 to 12.542 | 11.653 | 11.860 | 12.676 |
| I | −0.10 | −0.39 | 0.49 | −9.097 to 8.904 | −8.319 to 7.539 | −6.043 to 7.030 | 9.001 | 7.929 | 6.536 |
| IT | −0.44 | 0.45 | −0.08 | −14.158 to 13.280 | −12.654 to 13.560 | −13.753 to 13.584 | 13.719 | 13.107 | 13.668 |
| T | 0.14 | 0.01 | −0.19 | −7.926 to 8.209 | −6.420 to 6.439 | −8.101 to 7.720 | 8.067 | 6.429 | 7.911 |
| ST | −0.90 | 0.78 | 0.17 | −9.031 to 7.236 | −7.690 to 9.248 | −6.177 to 6.518 | 8.133 | 8.469 | 6.347 |
Pair 1, “measurement 1 – measurement 2”; pair 2, “measurement 2 – measurement 3”; and pair 3, “measurement 3 – measurement 1”.
LoA = limit of agreement; CR = coefficient of repeatability; S = superior; SN = superior nasal; N = nasal; IN = inferior nasal; I = inferior; IT = inferior temporal; T = temporal; ST = superior temporal.