Fig. 3
From: Novel method of transpulmonary pressure measurement with an air-filled esophageal catheter
Bland–Altman analyses in obese and non-obese patients under controlled mode. The difference between the plateau (left), end-expiratory (middle) and delta (right) esophageal pressures measured by the air-filled catheter and the balloon catheter in volume-controlled mode are plotted against the mean of the two measurements. Solid lines represent the mean differences and the limits of agreement. Dashed lines represent their respective 95% confidence interval. The colored circles represent single measurements (n = 12 for each patient), with non-obese patients (n = 9) in green and obese ones (n = 6) in red. Black triangles and circles represent the medians of all measurements in non-obese and obese patients, respectively