| Box 1. Outcome measurements of respiratory training | |
| Respiratory function tests | |
| Abbreviation | |
| FEV1 | Forced expiratory volume in 1 second |
| FVC | Forced vital capacity |
| MEP | Maximal expiratory pressure |
| MIP | Maximal inspiratory pressure |
| MV | Minute ventilation |
| MVV | Maximum voluntary ventilation |
| PDQ-39 | Parkinson disease questionnaire 39 |
| PEF | Peak expiratory flow |
| PmPeak | Inspiratory muscle endurance |
| POD | Perception of Dyspnea |
| QoL (SF-36) | Quality of Life (medical outcomes study 36-item short form health survey) |
| r-PCF | Reflex peak cough flow |
| SVC | Slow vital capacity |
| TV | Tidal volume |
| VFS | Videofluoroscopic studies |
| v-PCF | Voluntary peak cough flow |
| VT,rca | Abdominal ribcage tidal volume |
| VT,rcp | Pulmonary rib cage tidal volume |
| Swallowing outcomes | |
| Abbreviation | |
| PAS | Penetration-aspiration scale |
| SWAL-QoL | Swallowing Quality of Life |
| Questionnaire | |
| Phonatory capacity | |
| Abbreviation | |
| MPT | Maximum phonation time |
| Peak SGP | Peak subglottic pressure |
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