Lung motion velocity, median [interquartile range] (mm/s) | p values | ||||||
---|---|---|---|---|---|---|---|
(1) Normal (n = 47) | (2) COPD mild (n = 14) | (3) COPD severe (n = 22) | Alla | (1) vs (2) b | (2) vs (3) c | (1) vs (3) d | |
Right | |||||||
Tidal inspiration | 16.8 [14.1, 19.9] | 28.5 [21.7, 33.9] | 25.1 [17.8, 31.3] | < 0.001** | < 0.001** | 0.432 | 0.002** |
Tidal expiration | -14.5 [-18.4, -11.5] | -22.1 [-28.6, -19.2] | -15.6 [-25.2, -12.9] | < 0.001** | < 0.001** | 0.059 | 0.206 |
Forced inspiration | 28.8 [22.5, 36.2] | 24.1 [20.7, 37.3] | 36.3 [25.3, 47.6] | 0.107 | 0.502 | 0.214 | 0.214 |
Forced expiration | -23.6 [-31.4, -18.5] | -32.9 [-46.6, -20.8] | -27.0 [-40.3, -21.9] | 0.093 | 0.227 | 0.810 | 0.227 |
Left | |||||||
Tidal inspiration | 20.8 [17.7, 23.4] | 23.9 [22.3, 29.1] | 24.6 [19.9, 26.2] | 0.012* | 0.018* | 0.642 | 0.089 |
Tidal expiration | -19.3 [-21.5, -16.4] | -25.5 [-30.9, -22.0] | -18.4 [-23.8, -15.0] | 0.009** | 0.004** | 0.038* | 0.934 |
Forced inspiration | 31.2 [27.4, 36.5] | 28.3 [23.5, 38.6] | 31.6 [26.1, 39.0] | 0.678 | 1.000 | 1.000 | 1.000 |
Forced expiration | -27.1 [-33.5, -22.0] | -33.8 [-43.6, -27.7] | -27.8 [-39.0, -21.1] | 0.171 | 0.166 | 0.479 | 0.650 |