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Table 4 Correlations between biomechanical parameters and corneal sublayer thickness in the suspected KC (SKC) group

From: Relationship between corneal biomechanical parameters and corneal sublayer thickness measured by Corvis ST and UHR-OCT in keratoconus and normal eyes

   EPT BLT STT
SP-A1a r 0.223 0.186 0.721
P 0.185 0.270 0.000d
SP-A1c r 0.049 −0.015 0.686
P 0.780 0.931 0.000d
A1Va r −0.057 −0.141 −0.421
P 0.691 0.320 0.002d
A2Va r −0.059 0.214 0.353
P 0.677 0.128 0.010d
PDa r −0.159 −0.338 −0.413
P 0.260 0.014d 0.002d
HCRa r −0.020 0.224 0.386
P 0.887 0.111 0.005d
HCDfAa r −0.007 −0.301 −0.365
P 0.963 0.030d 0.008d
IRa r −0.054 0.258 −0.654
P 0.702 0.064 0.000d
ARTha r 0.162 0.095 0.242
P 0.252 0.502 0.084
DA ratioa r −0.035 −0.373 −0.815
P 0.803 0.006d 0.000d
CBIb r −0.175 −0.268 −0.644
P 0.214 0.055 0.000d
TBIb r 0.143 −0.227 −0.116
P 0.313 0.106 0.414
  1. EPT = epithelial thickness; BLT = Bowman’s layer thickness; STT = stromal thickness; SP-A1 = stiffness parameter at first applanation; A1V = corneal apex velocity at first applanation; A2V = corneal apex velocity at second applanation; PD = peak distance; HCR = highest concavity radius of curvature; HCDfA = deflection amplitude at highest concavity; IR = integrated radius; ARTh = Ambrosio relational thickness to the horizontal profile; DA = deformation amplitude; CBI = Corvis biomechanical index; TBI = tomographic and biomechanical index; aPearson correlation test; bSpearman correlation test; cPartial correlation analysis controlling for the thickness of the other two layers; dP < 0.05