There is lots of evidence for the arts in health, you can find lots of references in these reports as well as case studies and examples of the arts being used in various health care settings.
Older and wiser? Creative ageing in the UK 2010-19 King’s College London. November 2019
What is the evidence on the role of the arts in improving health and well-being? A scoping review (2019) World Health Organization. November 2019
Live Music in Care, The impact of music interventions for people living and working in care home settings. Winchester University. November 2018
‘What would life be – without a song or a dance, what are we?’ A report from the Commission on Dementia and Music. The Utley Foundation and ILC. 2018.