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Table 6 The difference and agreement for corneal power measurements between CASIA swept-source optical coherence tomography and Pentacam Scheimpflug imaging in children

From: The precision and agreement of corneal thickness and keratometry measurements with SS-OCT versus Scheimpflug imaging

Device Pairings Mean ± SD P Value 95% LoA
Km 0.21 ± 0.15 <  0.001 −0.09 to 0.51
J0 0.00 ± 0.12 0.849 − 0.23 to 0.23
J45 0.03 ± 0.15 0.116 − 0.26 to 0.31
Nasal 2 mm 0.33 ± 0.27 <  0.001 − 0.21 to 0.87
Superior 2 mm 0.32 ± 0.39 <  0.001 −0.45 to 1.08
Temporal 2 mm 0.00 ± 0.26 0.966 −0.51 to 0.52
Inferior 2 mm 0.14 ± 0.32 <  0.001 −0.48 to 0.77
Nasal 5 mm −0.01 ± 0.22 0.797 − 0.44 to 0.42
Superior 5 mm −0.01 ± 0.43 0.876 −0.86 to 0.84
Temporal 5 mm 0.00 ± 0.22 0.875 −0.42 to 0.43
Inferior 5 mm −0.15 ± 0.27 <  0.001 − 0.68 to 0.37
  1. Keratometric data are in units of diopter (D); Mean ± SD = Mean ± Standard deviation generated by paired T-test; 95% LoA = 95% limits of agreement