Answers to the question“During the normal process of home ventilation, do you receive information on the following?”
| Always % | Often % | Sometimes % | Never % | No answer % | |
| Change of ventilator | 71 | 9 | 9 | 5 | 6 |
| Change of interface | 53 | 17 | 16 | 7 | 7 |
| Minor incidents# | 25 | 23 | 34 | 13 | 5 |
| Major incidents¶ | 61 | 19 | 11 | 4 | 5 |
Data are presented as percentages of centres. #: noise, vibration; ¶: arrest, malfunction.