Methods
A prospective cohort of 137 patients aged 70 or more undergoing cardiac
surgery with the use of cardiopulmonary bypass were recruited at three
university-affiliated hospitals in Spain. Frailty status was assessed
preoperatively and six months after surgery using two different
validated frailty measurements: The Fried frailty scale and the Clinical
Frailty Scale. We analyzed the changes in these frailty scores and the
transitions between frailty status after surgery.