Table 2
Mean difference between repeat measurements, repeatibility coefficients, and intraclass correlation coefficients for each method of cataract grading. (Calculated on 113 eyes, each measured twice)
| Laser slit lamp | LOCS III score | ||||
|---|---|---|---|---|---|
| pixel intensity | Nuclear colour | Nuclear opalescence | |||
| Mean difference (session 2–session 1) (95% CI) | 0.40 (−0.24–1.04) | 0.06 (−0.01–0.13) | 0.06 (−0.01–0.14) | ||
| Intraclass correlation (%) (95% CI) | |||||
| Healthy subjects | 38.6 (12.9–59.2) | 82.3 (71.1–89.4) | 76.1 (62.3–85.4) | ||
| Cataract subjects | 94.7 (91.2–96.9) | 94.1 (90.2–96.4) | 93.5 (89.4–96.1) | ||
| All subjects | 95.0 (92.9–96.5) | 96.7 (95.3–97.8) | 97.0 (95.6–97.9) | ||
