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Table 1 Intraobserver repeatability outcomes for corneal thickness obtained using CASIA swept-source optical coherence tomography 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 537.75 ± 29.16 1.15 3.18 0.21 0.998 (0.998 to 0.999)
2nd 537.77 ± 29.10 1.08 2.98 0.20 0.999 (0.998 to 0.999)
Thinnest 1st 532.46 ± 29.67 1.45 4.02 0.27 0.998 (0.997 to 0.998)
2nd 532.62 ± 29.56 1.50 4.15 0.28 0.997 (0.996 to 0.998)
Nasal 2 mm 1st 546.77 ± 29.00 1.95 5.41 0.36 0.995 (0.993 to 0.997)
2nd 546.82 ± 29.08 1.77 4.91 0.32 0.996 (0.995 to 0.998)
Superior 2 mm 1st 549.15 ± 29.19 2.32 6.42 0.42 0.994 (0.991 to 0.996)
2nd 548.98 ± 29.41 2.14 5.92 0.39 0.995 (0.992 to 0.996)
Temporal 2 mm 1st 536.99 ± 29.54 2.18 6.04 0.41 0.995 (0.992 to 0.996)
2nd 536.92 ± 29.64 1.55 4.29 0.29 0.997 (0.996 to 0.998)
Inferior 2 mm 1st 537.42 ± 29.87 1.94 5.39 0.36 0.996 (0.994 to 0.997)
2nd 537.65 ± 29.97 1.63 4.51 0.30 0.997 (0.996 to 0.998)
Nasal 5 mm 1st 586.02 ± 29.48 3.86 10.70 0.66 0.983 (0.975 to 0.989)
2nd 586.26 ± 29.60 3.31 9.18 0.57 0.988 (0.982 to 0.992)
Superior 5 mm 1st 595.47 ± 30.30 3.96 10.97 0.67 0.983 (0.976 to 0.989)
2nd 595.56 ± 31.10 4.48 12.42 0.75 0.980 (0.970 to 0.986)
Temporal 5 mm 1st 560.95 ± 30.29 3.53 9.77 0.63 0.987 (0.981 to 0.991)
2nd 560.86 ± 30.40 2.74 7.59 0.49 0.992 (0.988 to 0.995)
Inferior 5 mm 1st 569.06 ± 31.43 3.65 10.11 0.64 0.987 (0.981 to 0.991)
2nd 569.31 ± 31.37 3.23 8.96 0.57 0.989 (0.985 to 0.993)
  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