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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