Skip to main content

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).