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Table 3 Pearson correlation vs intraclass correlation between NCT, iCare pro and GAT measurements in four IOP groups

From: Comparability of three intraocular pressure measurement: iCare pro rebound, non-contact and Goldmann applanation tonometry in different IOP group

  

IOP < 10 mmHg

IOP 10–21 mmHg

IOP 22–30 mmHg

IOP > 30 mmHg

NCT

iCare

GAT

NCT

iCare

GAT

NCT

iCare

GAT

NCT

iCare

GAT

r

NCT

 

0.610

0.738

 

0.490

0.578

 

0.535

0.545

 

0.868

0.858

iCare

  

0.576

  

0.478

  

0.665

  

0.945

ICC

NCT

 

0.572

0.714

 

0.687

0.726

 

0.457

0.381

 

0.889

0.886

iCare

  

0.521

  

0.668

  

0.638

  

0.995

  1. NCT Non-contact tonometer; iCare rebound tonometer iCare Pro, GAT Goldmann tonometry, IOP Intraocular pressure, r Pearson correlation coefficient, ICC Intraclass correlation coefficient