Citation patterns and cluster identification
| Cluster-ID | Narrative description of the content | Keywords no in the cluster | Colour of cluster | Cluster (Label) |
| #1 | This cluster focused on two main diseases: cancer and heart disease. The words included chemotherapy, dysphagia, mortality, outcomes, prognosis, QOL, radiotherapy, surgery, survival, single ventricle, treatment. | 16 | Red | Chronic heart failure and cancer prognosis |
| #2 | The words in this cluster shed light on nursing, care planning, dementia, home care, long-term care, nursing home, older people, quality of care. | 15 | Green | Nursing home |
| #3 | The words in this cluster shed light on pain and symptom related issues such as assessment, delirium, anxiety and depression, dyspnoea, opioid, pain, symptom management. | 10 | Blue | Pain and symptom management |
| #4 | The word in this cluster summarised the attitudes and knowledge about end-of-life care-related issues, including critical care, quality improvement, decision making, nursing, survey | 9 | Yellow | Knowledge and Attitudes toward end-of-life care |
| #5 | This cluster focused on evaluation and quality improvement of services. It included terms such as hospital, intensive care, evaluation, quality. | 5 | Purple | Quality improvement of services |
| #6 | Communication, decision making, ethics, euthanasia. | 5 | Ginzary | Palliative care ethics |
| #7 | This cluster contains words that focused on ongoing assessment of the services. It covers keywords such as community, health services research, primary care, public health,. | 5 | Orange | Ongoing assessment of palliative care services |
QOL, quality of life.