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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Ophthalmology. 2014 Aug 22;121(12):2325–2333. doi: 10.1016/j.ophtha.2014.07.001

Table 2.

Corneal Backscatter and Central Corneal Thickness

Fuchs Dystrophy
Normal
Mild Moderate Advanced
Anterior Corneal Backscatter (SU) 1382 ± 282b,c,d 1457 ± 227c 2053 ± 579 1231 ± 230
pa 0.08 0.003 <0.001 -
Mid-Corneal Backscatter (SU) 888 ± 160 893 ± 184 1109 ± 141e 908 ± 205
pa 0.93 0.93 <0.001 -
Central Corneal Thickness (μm) 566 ± 29 568 ± 37 588 ± 53 553 ± 30
pa 0.19 0.22 0.03 -

All values are mean ± standard deviation; SU, scatter units17

a

p-values are versus control, generalized estimating model equations

b

p=0.76 vs. moderate Fuchs dystrophy

c

p<0.001 vs. advanced Fuchs dystrophy

d

Minimum detectable difference compared to controls, 155 SU (α=0.05, β=0.20)

e

p<0.001 vs. mild and p<0.001 vs. moderate Fuchs dystrophy