Table 1.

Reproducibility of Testing Modalities using the Intraclass Correlation Coefficient

Testing Modality	ICC	95% CI
Slit Lamp Examination
Stromal thinning (%)	0.95	0.88 to 0.98
Total thinning (%)	0.92	0.82 to 0.97
Maximal thinning clock hour	0.85	0.67 to 0.94
Maximal thinning distance (mm)	0.85	0.80 to 0.97
Ultrasonic Pachymetry
Central Pachymetry (μm)	0.87	0.76 to 0.94
Total thickness* (μm)	0.93	0.87 to 0.97
AS-OCT
Maximal thinning clock hour	0.43	0.17 to 0.68
Maximal thinning distance (mm)	0.71	0.52 to 0.86
Total thickness* (μm)	0.95	0.89 to 0.98
Pentacam
Central Pachymetry (μm)	0.75	0.56 to 0.88
Total thickness* (μm)	0.87	0.74 to 0.95

Abbreviations: ICC, Intraclass Correlation Coefficient; 95% CI, 95% Confidence Intervals; mm, millimeters; AS-OCT, Anterior Segment Optical Coherence Tomography.

^*Total corneal thickness in area of maximal cornea thinning in microns.