Table 2.
The Intraclass Correlation Coefficient for the Ocular Staining Score in the Sjogren’s International Collaborative Clinical Alliance
| Exam element | Mean ICC (95% CI) | ||
|---|---|---|---|
| Right | Left | Both Eyes | |
| Total OSS score | 0.91 (0.85 – 0.96) | 0.90 (0.83 – 0.97) | |
| Max OSS score | 0.90 (0.83 – 0.96) | ||
| OSS score between eyes | 0.95 (0.93 – 0.96) | ||
| Tear Break up Timea | 0.77 (0.64 – 0.89) | 0.81 (0.68 – 0.90) | 0.81 (0.68 – 0.91) |
| Conjunctival stainingb | 0.87 (0.80 – 0.93) | 0.85 (0.75 – 0.93) | |
| Corneal stainingc | 0.86 (0.76 – 0.93) | 0.90 (0.81 – 0.95) | |
Abbreviations: ICC, intraclass correlation coefficient; CI, confidence intervals; OSS, ocular staining score.
a
Measured in seconds, average of three measurements. Both eyes represents average tear break up time between the two eyes.
b
Calculated by adding nasal and temporal staining
c
Calculated by adding corneal stain plus three bonus points for patches of confluent staining, staining in pupillary area, and presence of filaments.