Agreement between Gonioscopic Examination and Swept Source Fourier Domain Anterior Segment Optical Coherence Tomography Imaging

Table 4

Fourier domain anterior segment optical coherence tomography agreement for angle classification (kappa [95% confidence interval]).

Kappa; [95% CI]	Agree				Disagree; (%)
		Overall; (%)	Narrow	Open
Interobserver, visit 1
0.73	85	74 (87%)	30	44	11 (13%)
Interobserver, visit 2
0.58	72	58 (81%)	19	39	14 (19%)
Intraobserver (intervisit), reader 1
0.57	71	57 (80%)	18	39	14 (20%)
Intraobserver (intervisit), reader 2
0.83	71	65 (92%)	26	39	6 (8%)

CI: confidence interval.
Kappa criteria: <0.2 poor; 0.21 to 0.40 fair; 0.41 to 0.60 moderate; 0.61 to 0.80 good; and >0.80 excellent.