Table 3 Agreement between the EIT-derived and TTE-derived systolic pulmonary artery pressure estimates at the subject-wise level.

From: Non-invasive pulmonary artery pressure estimation by electrical impedance tomography in a controlled hypoxemia study in healthy subjects

Subject-wise measurements

Minimum

Q1

Median

Q3

Maximum

Mean of the differences (mmHg)

 − 5.4

 − 2.6

0.7

1.4

4.8

SD of the differences (mmHg)

1.6

2.9

3.8

4.7

6.1

Pearson’s correlation coefficient

0.63

0.78*

0.87*

0.92*

0.99*

  1. For each subject, the mean and standard deviation (SD) of the paired differences between both methods was computed, along with Pearson’s correlation coefficient. The distributions over all participants are shown using the three quartiles (Q1, median, and Q3), and the range (minimal and maximal values).
  2. EIT electrical impedance tomography, TTE transthoracic echocardiography.
  3. *Significant at the 5% significance level (P < 0.05).
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