This is an observational study where KT candidates will be assessed for frailty according to:~Frailty Fried Phenotype and~FRAIL scale~Sociodemographics and clinical variables will be collected and serum samples will be obtained in order to implement further studies regarding biomarkers of frailty..
Frailty is common among chronic kidney disease patients who are on the kidney transplant (KT) waiting list.~The aim of this study is to assess frailty according to different frailty tools among KT candidates and to establish potential biomarkers of frailty.