Fig. 3— Data from the second set of six asthmatic subjects showing the accuracy of the prediction model derived from inspiratory reactance of the respiratory system (Xrs,I) for predicting inspiratory transpulmonary resistance (RL,I). This is a scatter plot of the difference between predicted values of RL,I (from equation for fig. 2b⇑, derived from the first five asthmatics) and measured RL,I against measured RL,I (•). For comparison, the same plot using inspiratory resistance of the respiratory system (○) is also shown. The mean±sd difference for values predicted from Xrs,I is −0.067±0.25 kPa·s·L−1.