The level of fitness/health a patient has entering the marathon of recovery from critical illness or trauma has a major impact on morbidity and mortality. Frailty is a measure of this fitness level. The clinical frailty scale can be used to assess your patients ability to survive critical illness. Age is a number. Frailty is more useful.
https://bookdown.org/jfronczekmd/prevent_mins_documents/clinical-frailty-scale-cfs.html
