Table 2.
Agreement on presence of fluid on paired spectral domain (SD) and time domain (TD) optical coherence tomography.
| Variable | Agree present no. pairs (%) |
Agree absent no. pairs (%) |
SD present TD absent no. pairs (%) |
SD absent TD present no. pairs (%) |
Total no. eyes |
Exact Agreement % |
P Value* | Kappa | 95% CI |
|---|---|---|---|---|---|---|---|---|---|
| Any Fluid | 811 (69.4) | 144 (12.3) | 135 (11.5) | 79 (6.8) | 1169 | 81.7 | < 0.001 | 0.46 | 0.40 – 0.52 |
| Intraretinal Fluid (cystoid spaces) | 480 (41.0) | 381 (32.5) | 119 (10.2) | 192 (16.4) | 1172 | 73.5 | < 0.001 | 0.47 | 0.42 – 0.52 |
| Intraretinal Fluid, center 1 mm | 332 (70.8) | 40 (8.5) | 29 (36.7) | 68 (14.5) | 469 | 79.3 | < 0.001 | 0.33 | 0.23 – 0.43 |
| Intraretinal Fluid, foveal center | 49 (15.5) | 177 (55.8) | 11 (3.5) | 80 (25.5) | 317 | 71.3 | < 0.001 | 0.35 | 0.25 – 0.45 |
| Subretinal Fluid | 371 (31.9) | 637 (54.8) | 118 (10.2) | 36 (3.1) | 1162 | 86.7 | < 0.001 | 0.72 | 0.68 – 0.76 |
| Subretinal Fluid, center 1 mm | 265 (73.4) | 55 (15.2) | 25 (6.9) | 16 (4.4) | 361 | 88.6 | 0.16 | 0.66 | 0.56 – 0.75 |
| Subretinal Fluid, foveal center | 157 (59.7) | 61 (23.2) | 13 (4.9) | 32 (12.2) | 263 | 82.9 | 0.005 | 0.61 | 0.51 – 0.71 |
| Sub-RPE Fluid | 324 (29.3) | 555 (50.2) | 174 (15.7) | 52 (4.7) | 1105 | 79.5 | < 0.001 | 0.58 | 0.53 – 0.62 |
| Sub-RPE Fluid, center 1 mm | 229 (72.5) | 29 (9.2) | 32 (10.1) | 26 (8.2) | 316 | 81.6 | 0.43 | 0.39 | 0.26 – 0.52 |
| Sub-RPE Fluid, foveal center | 128 (57.9) | 39 (17.6) | 12 (5.4) | 42 (19.0) | 221 | 75.6 | < 0.001 | 0.43 | 0.31 – 0.55 |
CI = confidence interval, RPE = retinal pigment epithelium.
*
P Value based on McNemar test for symmetry between paired proportions.