| Ctrl. | Control group |
| HMV | Home mechanical ventilation |
| Inter. | Intervention group |
| IQR | Interquartile range |
| IV | Invasive ventilation |
| mo | Months |
| n | Sample size |
| n/a | Not applicable |
| NIV | Non-invasive ventilation |
| VAIs | Ventilator-assisted individuals |
| y | Years |
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