Table 4.

Inter-rater reliability of grading presence of FD, NV and number of CAs (study phase; n=40)

Ordinal scale	Total agreement (LWκ V.1) (%)	LWκ (V.1) (95% CI)	LWκ (V.2) (95% CI)
FD	83.3	0.60 (0.40 to 0.79)	0.51 (0.30 to 0.72)
CA	93.8	0.72 (0.59 to 0.85)	0.75 (0.56 to 0.89)
NV	99.2	0.96 (0.85 to 1.0)	0.98 (0.93 to 1.0)

LWκ (V.1): no cut-point applied in the weights schedule.

LWκ (V.2): cut-point applied in weights when raters A and B disagree between grades 0 and >0.

CA, calcification; FD, fibrillar disruption; LWκ, linear weighted κ; NV, neovascularity.