| SCI | Cervical spinal cord injury |
| tSCS | Transcutaneous spinal cord stimulation |
| cont | Control |
| C | Cervical |
| UEMS | Upper extremity motor score |
| NA | Not available |
| MIP | Maximal inspiratory pressure |
| MEP | Maximal expiratory pressure |
| ASIA | American Spinal Injury Association |
| AIS | ASIA Impairment Scale. |
| FVC | Forced vital capacity (FVC) |
| FEV1 | Forced expiratory volume in one second |
| PEF | Peak expiratory flow |
| FEF | Forced expiratory flow |
| CI | Confidence interval |
| NLI | Neurological level of the injury |
| M | Male |
| F | Female |
| T | Traumatic |
| SD | Standard deviation |
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