Table 6 The mean difference, paired t-test, 95% LoA and ICC for intraocular lens calculation differences between the two different operators based on a single method (from the first reading from each operator) using OA-2000 swept-source optical coherence tomography in cataract patients.

From: Precision of a new ocular biometer in eyes with cataract using swept source optical coherence tomography combined with Placido-disk corneal topography

Device Pairings

Mean Difference ± SD

P Value*

95% LoA

ICC (95% CI)

SRK/T (Φ = 2.5) (D)

0.00 ± 0.19

0.541

−0.36 to 0.37

0.996 (0.993 to 0.997)

Holladay 1(Φ = 2.5) (D)

0.00 ± 0.21

0.092

−0.41 to 0.41

0.995 (0.992 to 0.997)

Hoffer Q(Φ = 2.5) (D)

0.00 ± 0.23

0.565

−0.44 to 0.45

0.994 (0.991 to 0.996)

SRK/T (Φ = 3.0) (D)

0.00 ± 0.15

0.853

−0.30 to 0.31

0.997 (0.995 to 0.998)

Holladay 1(Φ = 3.0) (D)

0.01 ± 0.17

0.706

−0.33 to 0.34

0.996 (0.994 to 0.998)

Hoffer Q(Φ = 3.0) (D)

0.01 ± 0.19

0.924

−0.36 to 0.38

0.996 (0.994 to 0.998)

  1. SD = Standard deviation, LoA = limits of agreement, ICC = intraclass correlation coefficient.
  2. *Two ways.
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