Validation of the phenol red thread test in a Chinese population

BMC Ophthalmology

Table 3 Intra-observer repeatability and inter-observer reproducibility for the PRT^a test

	Intra-observer repeatability		Inter-observer reproducibility
	Experimental group	control group	Experimental group	Control group
n	63	45	63	45
ICC^b	0.747	0.723	0.588	0.610
95% CI^c for ICC	0.614 to 0.761	0.548 to 0.838	0.401 to 0.728	0.391 to 0.764
P value	< 0.001	< 0.001	< 0.001	< 0.001
Bland–Altman 95% limits of agreement	-4.008 to 4.468	-5.227 to 4.738	-5.597 to 4.732	-4.908 to 6.041

^aPRT phenol re thread, ^bICC intraclass correlation coefficient, 95% ^cCI 95% confidence interval for the mean

ISSN: 1471-2415