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

Table 3

Gonioscopic intraobserver (intervisit) agreement for angle classification by examiner (kappa [95% confidence interval]).

Examiner	Kappa; [95% CI]		Agree			Disagree; (%)
			Overall; n (%)	Narrow; n	Open; n
V	0.67	6	5 (83%)	3	2	1 (17%)
W	0.72	27	24 (89%)	6	18	3 (11%)
X	0.86	32	30 (94%)	10	20	2 (6%)
Y	0.68	36	31 (86%)	9	22	5 (14%)
Z	0.53	41	38 (93%)	2	36	3 (7%)
Combined	0.74 [0.62, 0.87]	142	128 (90%)	30	98	14 (10%)

CI: confidence interval.
The kappa criteria were <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.