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Table 3 Intraclass correlation coefficients for study participants

From: Introduction of a digital near-vision reading test for normal and low vision adults: development and validation

Parameter NVG LVG Total
ICC 95% CI ICC 95% CI ICC 95% CI
RA 0.963 [0.940, 0.977] 0.986 [0.969, 0.993] 0.993 [0.990, 0.996]
MRS 0.879 [0.718, 0.939] 0.794 [0.565, 0.902] 0.951 [0.917, 0.970]
CPS 0.854 [0.766, 0.910] 0.723 [0.425, 0.867] 0.955 [0.933, 0.970]
ACC 0.928 [0.819, 0.965] 0.894 [0.779, 0.950] 0.977 [0.962, 0.985]
  1. [ICCs: two-way mixed, average measures, absolute agreement]
  2. ACC = reading accessibility index; CI = confidence interval; CPS = critical print size; ICC = intraclass correlation coefficient; LVG = low vision group; MRS = maximum reading speed; NVG = normal vision group; RA = reading acuity