The British Geriatric Society (BGS) has published a list of preferred language when referring to older people in a health context.
It has been compiled to help healthcare professionals, academics and authors to avoid language which may be considered unacceptable or inappropriate.
The list provides a guide regarding language to avoid and preferred alternatives. It can be found here: https://www.bgs.org.uk/resources/preferred-language-when-referring-to-older-people-in-a-health-context