This table from page 71 of the Delirium, Dementia, and Depression in Older Adults: Assessment and Care BPG (2016) looks at predisposing and precipitating risk factors as well as signs of depression.
Registered Nurses’ Association of Ontario. (2016). Delirium, Dementia, and Depression in Older Adults: Assessment and Care. Toronto, ON, Canada: Author. Retrieved from http://rnao.ca/bpg/guidelines/assessment-and-care-older-adults-delirium-...