| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| 4 | None | None | ||
| 3 | Intermittent use of NIPPV | Intermittent use of NIPPV | ||
| 2 | Continuous use of NIPPV during the night | Continuous use of NIPPV during the night | ||
| 1 | Continuous use of NIPPV during the night and day | Continuous use of NIPPV during the night and day | ||
| 0 | Invasive mechanical ventilation by intubation or tracheostomy | Invasive mechanical ventilation by intubation or tracheostomy |