Table 2.
Interobserver, Interdevice, and Interocular Agreements in Definitely Decreased Autofluorescence Area and Square Root Area
| Comparisons | Sample Size | Mean Difference | Limits of Agreement∗ | P Value† |
|---|---|---|---|---|
| DDAF area (mm2) | ||||
| Interobserver | ||||
| F.K.C. vs. R.C.H.J.‡ baseline RE | 61 | –0.12 | –3.13 to +2.87 | 0.528 |
| F.K.C. vs. R.C.H.J.‡ baseline LE | 59 | –0.46 | –4.68 to +3.73 | 0.104 |
| Interdevice | ||||
| O200 vs. H30 RE only | 45 | –0.19 | –2.38 to +1.99 | 0.266 |
| H55 vs. O200 RE only | 51 | +2.79 | –6.84 to +12.37 | < 0.001 |
| H55 vs. H30 RE only | 44 | +1.20 | –2.26 to +4.65 | < 0.001 |
| Interocular | ||||
| RE vs. LE baseline | 59 | –2.24 | –30.41 to +25.79 | 0.236 |
| RE vs. LE final | 50 | –2.03 | –22.75 to +18.58 | 0.180 |
| DDAF SRA (mm) | ||||
| Interobserver | ||||
| F.K.C. vs. R.C.H.J.‡ baseline RE | 61 | –0.02 | –0.20 to +0.17 | 0.168 |
| F.K.C. vs. R.C.H.J.‡ baseline LE | 59 | –0.02 | –0.31 to +0.26 | 0.197 |
| Interdevice | ||||
| O200 vs. H30 RE only | 45 | –0.03 | –0.37 to +0.30 | 0.221 |
| H55 vs. O200 RE only | 51 | +0.27 | –0.41 to +0.91 | < 0.001 |
| H55 vs. H30 RE only | 44 | +0.16 | –0.17 to +0.49 | < 0.001 |
| Interocular | ||||
| RE vs. LE baseline | 59 | –0.11 | –1.82 to +1.60 | 0.355 |
| RE vs. LE final | 50 | –0.13 | –2.03 to +1.75 | 0.330 |
DDAF = definitely decreased autofluorescence; LE = left eye; H30 = Heidelberg 30° × 30° lens; H55 = Heidelberg 55° × 55° lens; O200 = Optos200 device; RE = right eye; SRA = square root area.
∗
Bland-Altman 95% limits of agreement defined by mean ± 1.95 × standard deviation.
†
Paired sample t test.
‡
Author initials.