Fig. 5.

Intersession variation results for (A) Tidal volume and (B) Abdominal surface marker period. Patient distributions of the intersession standard deviation (SD) of each metric for each breathing platform. Here, black squares indicate the distribution means, black horizontal lines indicate the distribution medians, and white circles indicate suspected outliers (i.e. data points lying outside 1.5 times the interquartile range). p-values shown are results from statistical tests between the free-breathe and the associated BIPAP platform.