Respiratory and peripheral muscle function
| Controls | COPD | p value | Mean difference (95% CI) | |
|---|---|---|---|---|
| Data are mean (SD). Pimaxrv and Pemaxtlc=maximal inspiratory and expiratory pressures; Pthmax=maximal expiratory sustainable pressure; Tth80=expiratory endurance time; HGS=hand grip dynamometry. | ||||
| Pimaxrv (cm H2O) | 110 (30) | 68 (24) | <0.01 | 42 (23 to 61) |
| Pimaxrv (% pred) | 88 (13) | 64 (21) | <0.05 | 24 (15 to 43) |
| Pemaxtlc (cm H2O) | 196 (42) | 129 (39) | <0.01 | 67 (40 to 95) |
| Pemaxtlc (% pred) | 84 (14) | 64 (19) | <0.01 | 20 (14 to 39) |
| Pthmax (cm H2O) | 151 (46) | 52 (27) | <0.01 | 99 (74 to 123) |
| Pthmax/Pemaxtlc (%) | 87 (35) | 44 (21) | <0.01 | 43 (17 to 53) |
| Tth80 (min) | 14.2 (7.4) | 9.4 (6.3) | <0.01 | 4.8 (1.0 to 10.4) |
| Dominant HGS (lb) | 11.2 (2.3) | 8.6 (1.4) | <0.05 | 2.6 (0.2 to 4.4) |
| Non-dominant HGS (lb) | 11.0 (2.8) | 8.9 (2.2) | <0.05 | 2.1 (0.4 to 4.4) |