Influence of Disc Size on the Diagnostic Accuracy of Cirrus Spectral-Domain Optical Coherence Tomography in Glaucoma

Table 2

Sensitivity at fixed specificity of optic nerve head measured by Cirrus HD-OCT in control and in glaucoma.

	All discs		Small discs		Large discs
	Sensitivity at specificity > 90%	Cutoff	Sensitivity at specificity > 90%	Cutoff	Sensitivity at specificity > 90%	Cutoff	Sensitivity CoV (%)
Rim area	0.92	0.96	0.88	0.88	0.92	0.96	2.8
Average C/D	0.68	0.74	0.71	0.69	0.76	0.76	4.9
Vertical C/D	0.83	0.71	0.76	0.71	0.89	0.78	10.9
Cup volume	0.37	0.45	0.5	0.33	0.24	0.73	48.9

CoV: coefficient of variation of sensitivity across small and large disc groups; : mm²; : mm³.