Table 1: Description of the ICUs participating in the study.
| Intensive care units | ICU beds | Number of admissions pr. year | Nurse: Patient ratio |
| Oslo University Hospital, Ullevaal | |||
| 1. Medical | 6 | 450 | 1.3 :1 |
| 2. Cardiac | 3 | 150 | 1:1 |
| 3. Surgical, general | 10 | 420 | 2:1 |
| 4. Neurosurgical | 6 | 220 | 2:1 |
| Diakonhjemmet Hospital | |||
| 5. Mixed general | 4 | 300 | 1:1 |
| Total | 29 | 1540* |
*Numbers pr. 2018.