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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