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Table 2 Intraobserver repeatability outcomes for corneal thickness obtained using Pentacam Scheimpflug imaging in children

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

Parameter Observer Mean ± SD Sw TRT CoV (%) ICC (95% CI)
Center 1st 542.66 ± 27.90 6.17 17.09 1.14 0.953 (0.932 to 0.968)
2nd 543.11 ± 28.85 5.30 14.68 0.98 0.967 (0.952 to 0.978)
Thinnest 1st 537.23 ± 28.42 7.27 20.15 1.35 0.937 (0.910 to 0.957)
2nd 537.67 ± 29.06 5.97 16.54 1.11 0.959 (0.941 to 0.972)
Nasal 2 mm 1st 555.26 ± 28.14 6.79 18.82 1.22 0.944 (0.920 to 0.962)
2nd 556.32 ± 29.41 6.11 16.92 1.10 0.958 (0.940 to 0.972)
Superior 2 mm 1st 562.38 ± 28.14 6.75 18.69 1.20 0.945 (0.921 to 0.962)
2nd 562.66 ± 29.36 6.46 17.88 1.15 0.953 (0.933 to 0.968)
Temporal 2 mm 1st 542.44 ± 27.91 7.18 19.88 1.32 0.937 (0.909 to 0.957)
2nd 542.77 ± 29.53 6.19 17.15 1.14 0.957 (0.939 to 0.971)
Inferior 2 mm 1st 543.71 ± 28.46 8.04 22.27 1.48 0.924 (0.892 to 0.948)
2nd 544.04 ± 29.29 6.85 18.96 1.26 0.947 (0.924 to 0.964)
Nasal 5 mm 1st 610.17 ± 29.88 11.06 30.65 1.81 0.874 (0.824 to 0.914)
2nd 611.59 ± 32.10 9.80 27.13 1.60 0.912 (0.876 to 0.940)
Superior 5 mm 1st 626.39 ± 31.49 11.51 31.89 1.84 0.877 (0.828 to 0.916)
2nd 626.06 ± 32.73 10.94 30.30 1.75 0.896 (0.853 to 0.929)
Temporal 5 mm 1st 578.10 ± 29.13 11.00 30.46 1.90 0.870 (0.818 to 0.910)
2nd 578.26 ± 31.92 10.32 28.59 1.78 0.902 (0.862 to 0.933)
Inferior 5 mm 1st 582.24 ± 31.00 12.34 34.19 2.12 0.857 (0.800 to 0.901)
2nd 583.09 ± 31.86 11.72 32.46 2.01 0.876 (0.826 to 0.915)
  1. Thickness data are in units of micrometer (μm); SD = standard deviation, Sw = within-subject standard deviation, TRT = test-retest repeatability (2.77 Sw), CoV = within-subject coefficient of variation, ICC = intraclass correlation coefficient