Repeatability and Reproducibility of Retinal Nerve Fiber Layer Parameters Measured by Scanning Laser Polarimetry with Enhanced Corneal Compensation in Normal and Glaucomatous Eyes

Table 3

Intravisit repeatability and intervisit reproducibility of SLP-ECC parameters in the normal group ().

GDx parameters	Intravisit						Intervisit
	ICC	ICC 95% CI			COV; (%)	TRT; SD	ICC	ICC 95% CI			COV; (%)	TRT; SD
		Upper limit	Lower limit					Upper limit	Lower limit
NFI	0. 935	0.906	0.956	<0.001	21.82	6.55	0.910	0.855	0.947	<0.001	19.91	6.48
TSNIT average	0.967	0.949	0.979	<0.001	2.43	2.51	0.946	0.912	0.968	<0.001	2.68	2.73
Superior average	0.940	0.913	0.959	<0.001	3.86	4.84	0.938	0.900	0.963	<0.001	3.88	4.90
Inferior average	0.944	0.919	0.962	<0.001	3.69	4.76	0.934	0.894	0.961	<0.001	3.82	4.84
TSNIT SD	0.928	0.896	0.951	<0.001	6.20	3.03	0.912	0.857	0.948	<0.001	8.54	3.56

ICC: intraclass correlation coefficient; CI: confidence interval; COV: coefficient of variation; TRT SD: test-retest variability; NFI: nerve fiber indicator; TSNIT: temporal-superior-nasal-inferior-temporal; SD: standard deviation.