Fig. 4
Limits of agreement between predicted PEEP and applied PEEP. Horizontal dashed line indicates zero difference. Solid horizontal lines indicate the mean and 95 % confidence intervals. Panel a Bland-Altman plot for all conditions during cNAVA (solid symbols) shows very little difference between mathematically predicted PEEP and applied PEEP. The mean difference was 0.2 ± 0.8 cm H2O. Panel b Bland-Altman plot for all conditions during tNAVA (open symbols) shows a greater little difference between predicted and applied PEEP. The mean difference was −3.6 ± 2.0 cm H2O