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Table 3 Summaries of the Bland-Altman plots

From: Repeatability of intraocular pressure measurements with Icare PRO rebound, Tono-Pen AVIA, and Goldmann tonometers in sitting and reclining positions

 

Bias

Limits of agreement

95%-CI

p-value

  

Lower

Upper

Lower

Upper

 

GAT2 (S) – GAT1 (S)

−0.06

−1.74

1.63

−0.235

0.347

0.701

ICP2 (S) – ICP1 (S)

−0.2

−3.3

2.8

−0.312

0.745

0.411

ICP2 (R) – ICP1 (R)

−0.2

−4.4

4.1

−0.584

0.890

0.676

TPA2 (S) – TPA1 (S)

0.1

−3.3

3.5

−0.699

0.477

0.703

TPA2 (R) – TPA1 (R)

0.0

−2.7

2.7

−0.465

0.465

1.000

MICP (S) – MGAT (S)

0.8

−4.6

6.2

−0.085

1.780

0.074

MICP (R) – MGAT (S)

1.7

−2.9

6.2

0.864

2.439

<0.001

MTPA (S) – MGAT (S)

0.5

−4.1

5.1

−0.266

1.321

0.1856

MTPA (R) – MGAT (S)

2.3

−3.4

8.0

1.319

3.292

< 0.001

MICP (R) – MICP (S)

0.8

−4.0

5.6

−0.032

1.640

0.059

MTPA (R) – MTPA (S)

1.8

−2.8

6.3

0.995

2.560

<0.001

  1. The agreement between measurement 1 and 2 with each tonometer and between GAT and each hand-held tonometer and position (sitting and reclining) and between sitting and reclining positions within both hand-held tonometers was investigated. Lower and upper limits of agreement were provided as 1.96-times standard deviation of the differences (SD). Bias, 95% limits of agreement and 95% confidence interval are provided in mmHg.
  2. (GAT Goldmann-Applanation-Tonometer, ICP Icare PRO, TPA Tono-Pen AVIA, CI confidence interval, M mean, S sitting, R reclining).