Footnotes

• Twitter @wilkinsoncg, @https://www.twitter.com/Krockdoc

• Contributors CW and KR co-authored this work.

• Funding CW was funded by the NIHR Research Trainees Coordinating Centre (Academic Clinical Lecturer).

• Competing interests CW has received a research grant from Bristol Myers Squibb. Through Dalhousie University, KR has asserted copyright of the Clinical Frailty Scale. It is free for research, education and not-for-profit healthcare. Users are asked to indicate that they will not change or commercialise it.

• Provenance and peer review Commissioned; internally peer reviewed.

• Author note References which include a * are considered to be key references.