Table 5.

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.