Table 2.

Mean scores of dry eye redness graded in 99 photographs using the clinical investigator-grading system (Ora Calibra™ Dry Eye Redness Scale [OCDER])

Grader	Mean 4 graders	Mean 1 grader	Standard deviation 4 graders	Standard deviation 1 grader	Pearson’s correlation	Accuracy	CCC	Lower CI CCC	Upper CI CCC
1	1.98	1.98	1.01	0.76	0.83	0.96	0.79	0.73	0.84
2	2.37	1.88	0.91	0.79	0.78	0.66	0.66	0.57	0.73
3	2.25	1.91	0.92	0.80	0.68	0.62	0.62	0.52	0.71
4	1.29	2.15	0.82	0.82	0.73	0.47	0.47	0.38	0.55
5	2.00	1.97	0.90	0.78	0.83	0.82	0.82	0.76	0.87

Notes: Means and standard deviations are presented for each individual grader, as well as the means and standard deviations for the other four investigators, considered as the hypothetical ‘true’ clinical OCDER scores, and used in subsequent agreement analysis for Pearson’s correlation coefficient, accuracy, and concordance correlation coefficients (CCC).

Abbreviations: CCC, concordance correlation coefficient; CI, confidence interval; OCDER, Ora Calibra™ Dry Eye Redness Scale.