Area under the curve (AUC) for EMG and lung function data
| Variable | AUC | SE |
| EMGpara evening | 0.783 | 0.084 |
| EMGpara morning | 0.706 | 0.089 |
| FEV1 evening | 0.700 | 0.177 |
| FEV1 morning | 0.721 | 0.167 |
| PEF evening | 0.684 | 0.095 |
| PEF morning | 0.672 | 0.097 |
AUC for receiver operating characteristics (ROC) curves. There was no significant difference between EMG and lung function parameters.
EMG, electromyogram; FEV1, forced expiratory volume over 1 s; PEF, peak expiratory flow.