FIGURE 2.
Selecting the closest three Rrs5 values that were taken over four to eight measurements significantly reduced the CoV compared to when only three measurements were taken. The mean (a) and CoV (b) of total Rrs5 was calculated when the three closest measurements were selected from four to eight 30-s oscillometry measurements carried out on healthy individuals (black squares) and people with asthma (orange triangles) or COPD (green circles; N=15 for all groups). **: p<0.01; ***: p<0.001; ***: p<0.0001 compared with measurement 3 of the respective patient group. CoV: coefficient of variation; Rrs5: resistance of the respiratory system at 5 Hz.