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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