Delay in starting treatment, older age group, and preexisting comorbidities are associated with worse outcomes.

Background: Geriatric patients experience more adverse events owing to early complications after TKA or THA related to preexisting comorbidities.

Conclusions: There are specific high-risk preexisting comorbidities for COVID-19 hospitalization and related deaths in community-based older men and women.

Four patients without preexisting comorbidities and early transplant referrals are alive with 100% donor chimerism and excellent performance status.