Correlation between inspiratory capacity (IC) and maximal inspiratory pressure (PImax)
| ΔPImax | Subjects n | ΔMDP | Subjects n | |
| All patients | ||||
| ΔIC at rest | 0.152 | 146 | −0.259 | 146 |
| Δ(IC effort – IC at rest) | −0.005 | 132 | ||
| Control group | ||||
| ΔIC at rest | 0.152 | 74 | −0.326 | 74 |
| Δ(IC effort – IC at rest) | 0.036 | 65 | ||
| IMT group | ||||
| ΔIC at rest | 0.178 | 72 | −0.207 | 72 |
| Δ(IC effort – IC at rest) | −0.058 | 67 |
Δ: difference between the beginning and the end of the programme; MDP: multidimensional dyspnoea profile; IMT: inspiratory muscle training.