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Table 1 The differences in parameters between the new OCLR and the standard PCI biometers

From: Comparison of a new optical biometer and a standard biometer in cataract patients

Parameter

New biometer

PCI biometer

Difference

p-Value

r-Value

ICC

Axial length (mm)

 Mean ± (SD)

23.12 ± 1.34

23.18 ± 1.08

-0.05 ± 0.05

<0.001

0.999

0.996

 Range

20.79, 26.5

20.93, 26.60

-0.16, 0.05a

   

Keratometry (D)

 Mean ± (SD)

44.50 ± 1.8

44.60 ± 1.81

-0.11 ± 0.37

<0.001

0.980

0.980

 Range

40.44, 47.38

40.57, 47.37

-0.84, 0.63

   

ACD (mm)

 Mean ± (SD)

3.06 ± 0.39

3.15 ± 0.39

-0.09 ± 0.24

<0.001

0.824

0.824

 Range

2.27, 3.10

2.29, 3.16

-0.58, 0.39

   

WTW (mm)

 Mean ± (SD)

11.64 ± 0.77

11.86 ± 0.48

-0.21 ± 0.82

0.018

0.259

0.231

 Range

8.74, 13.83

10.84, 12.80

-1.85, 1.42

   

IOL power (D)

SRK/T

 Mean ± (SD)

20.79 ± 2.81

20.44 ± 2.63

0.32 ± 0.60

<0.001

0.989

0.988

 Range

12.5, 27.5

12.0, 27.0

-1.53, 0.88

   
  1. OCLR= optical low coherence reflectometry, PCI= partial coherence interferometry, SD= standard deviation, D= diopters, ACD= anterior chamber depth, WTW= white-to-white corneal diameter, IOL= intraocular lens, r value= Pearson’s correlation coefficient, ICC= intraclass correlation coefficient
  2. a95 % limits of agreement