The nature of the evidence
| Location of study | |
| USA | 2 |
| Switzerland | 1 |
| Australia | 1 |
| Study setting | |
| Hospital | 3 |
| Home | 1 |
| Participants | |
| Patients | 2 |
| Family members | 1 |
| Carers | 1 |
| Diagnosis | |
| General palliative | 2 |
| Cancer | 1 |
| Chronic Obstructive Pulmonary Disease (COPD) | 1 |
| Stage of illness | |
| Palliative | 2 |
| Advanced | 1 |
| Mixed (advanced or recurrent) | 1 |