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. Author manuscript; available in PMC: 2011 Jan 14.
Published in final edited form as: Retina. 2010 Jan;30(1):63–70. doi: 10.1097/IAE.0b013e3181bd2c5a

Table 2.

Intrasession Repeatability Indices for Macular Thickness and Photoreceptor Outer Segment (PROS) Length in Diabetic Macular Edema Obtained Using Cirrus™ HD-OCT.

Coefficient of Variation (CVW) (± SD)
Macular Grid Central Subfield Center Foveal Point
Retinal Thickness 0.75 % (± 0.50 %) 2.38 % (± 2.21 %) 4.13 % (± 4.08 %)
PROS Length 1.97 % (± 1.48 %) 6.20 % (± 6.04 %) 14.01 % (± 9.57 %)
Intraclass Correlation Coefficient (ICC) (95% CI)
Macular Grid Central Subfield Center Foveal Point
Retinal Thickness 0.99 (0.98, 0.99) 0.98 (0.97, 0.99) 0.96 (0.93, 0.98)
PROS Length 0.98 (0.97, 0.99) 0.91 (0.84, 0.95) 0.73 (0.58, 0.85)

Repeatability indices are shown for the macular grid (6mm × 6mm), the central subfield (1mm), and the center foveal point (0.33mm).

SD = standard deviation.

CI = confidence interval.