Table 2.
Test–retest reliability of MIP, SMIP and ID measurements in COPD
| Variables | Mean±SD
|
ICC | 95% CI | SEM | |
|---|---|---|---|---|---|
| Test | Retest | ||||
| MIP (cmH2O) | 78.1±25.4 | 76.2±24 | 0.979 | 0.947–0.991 | 3.477 |
| SMIP (PTU) | 387.3±160.7 | 385.2±154 | 0.994 | 0.986–0.998 | 11.928 |
| ID (seconds) | 9.6±3.7 | 9.7±3.2 | 0.975 | 0.940–0.990 | 0.505 |
Abbreviations: ICC, intraclass correlation coefficient; ID, inspiratory duration; MIP, maximal inspiratory pressure; PTU, pressure time units; SEM, standard error of measurement; SMIP, sustained maximal inspiratory pressure.