How best to capture the impact of complementary therapies in palliative care: A systematic review to identify and assess the appropriateness and validity of multi-domain tools.

Of the tools identified, 'Functional Assessment of Cancer Therapy - General' appears to be the most suitable alternative tool against COMSIN criteria, for trials of massage, reflexology and aromatherapy in palliative care. Further tool validation is required before firm recommendations can be made. Co-development of a core outcome set could ensure relevant domains are assessed.