| In-patient | Medical | Nursing | ABG | PSG | Ptc,CO2 | |
| Overall | 65 | 42 | 58 | 96 | 77 | 62 |
| Australia | 60 | 50 | 55 | 100 | 90 | 70 |
| New Zealand | 83 | 17 | 67 | 83 | 33 | 33 |
| Larger | 75 | 50 | 58 | 100 | 75 | 67 |
| Smaller | 57 | 36 | 57 | 93 | 79 | 57 |
| Older | 56 | 56 | 67 | 100 | 78 | 67 |
| Newer | 75 | 33 | 58 | 92 | 75 | 58 |
Data are presented as %. ABG: arterial blood gas analysis; PSG: polysomnography; Ptc,CO2: transcutaneous carbon dioxide tension.