I don’t have any data to back it up with though so just speculation on my part. Iirc
@Neiler is in this line of work and can give more informed opinion.
I suspect you both have the right of it, 85+ would be a small demographic in the general population, pro rata per demographic of hospitalisation would be an interesting comparison, I suspect that might tell a different story.
You would have to assume those with significant comorbidities may be in residential or supported care, a standard practice on admission would be a discussion in regard to ceiling of care and future wishes. Many of these services would encourage a palliative approach and have a skill set around it.
I think in some ways hospitalisation of this demographic is residential care does present difficult ethical dilemmas, a DNR may be in place, but was it put in place with a pandemic in mind - probably not, does it matter if the end result could be incubation and likely fatality, would there be any chance recovery or would transfer to acute care promote an evasive uncomfortable pathway to dying. The opinion, choices of the patient & family all need to be weighed as well, and good clinical assessment decision making, providing the time is there of course & often isn’t. This would all be weighed in a large cohort of this particular demographic and perhaps inhibits the pathway to acute care, compare to a younger demographic.