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Table 3 Results of Bland–Altman analysis of agreements between PaCO2 and PETCO2

From: Accuracy evaluation of mainstream and sidestream end-tidal carbon dioxide monitoring during noninvasive ventilation: a randomized crossover trial (MASCAT-NIV trial)

 

Mean bias (95% CI)

95% Limits of agreement

During SBT, mmHg

2.51 (2.00–3.02)

 − 1.45 to 6.47

Previous method, mmHg

6.22 (5.22–7.23)

 − 1.54 to 13.99

Novel method, mmHg

2.70 (2.15–3.26)

 − 1.61 to 7.02

  1. CI, confidence interval; PaCO2, arterial partial pressure of carbon dioxide; PETCO2, end-tidal partial pressure of carbon dioxide; SBT, spontaneous breathing trial