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Correlation coefficient among parameters
| TV | VC | RSBI | PIMAX | |
|---|---|---|---|---|
| Diaphragmatic inspiratory excursion | 0.445* | 0.217 | −0.435* | 0.077 |
| TPIAdia | 0.639* | 0.522* | − 0.703* | 0.250 |
| DTD | 0.045 | −0.017 | −0.260π | 0.166 |
| TFdi | 0.001 | 0.117 | −0.218 | 0.237 |
TV Tidal volume, VC vital capacity, RSBI rapid shallow breathing index, PIMAX Maximum peak inspiratory pressure, TPIAdia time to peak inspiratory amplitude, DTD diaphragmatic thickness difference, TFdi diaphragm thickening fraction
*P value < 0.01
πP value < 0.05
