Frailty and Comorbidity Burden as Predictors of Recurrent Hospitalization in Older Vietnamese Adults with Heart Failure: A Prospective Cohort Study.

Of 150 participants (median age 75 years; 59.3% male), 54 (36.0%) were frail and 79 (52.7%) were hospitalized at least once.

The frailty-comorbidity composite showed a graded increase in hospitalization burden that did not persist after adjustment.

Discrimination was modest across all models (C-statistics near 0.60) and did not differ significantly between frailty (0.581) and left ventricular ejection fraction (0.568); combining both gave 0.610 (95% CI 0.560-0.661).