Cognitive impairment predicts mortality in outpatient veterans with heart failure.

BACKGROUND: In our prior study of 250 outpatient veterans with heart failure (HF), 58% had unrecognized cognitive impairment (CI) which was linked to worsened medication adherence. Literature suggests HF patients with CI have poorer clinical outcomes including higher mortality.

OBJECTIVE: The study is to examine mortality rates in outpatients with HF and undiagnosed CI compared to their cognitively intact peers.

METHODS: This is a retrospective study for all-cause mortality.

RESULTS: During the 3-year follow up, 64/250 (25.6%) patients died: 20/106 (18.9%) with no CI, 29/104 (27.9%) with mild CI, and 15/40 (37.5%) with severe CI. Patients with CI were at increased risk for mortality (hazard ratio 1.82, p = 0.038). Those with severe CI had the worst outcome (hazard ratio 2.710, p = 0.011).

CONCLUSIONS: CI was an independent risk factor for mortality in patients with heart failure when controlling for age and markers of disease severity. Cognitive screening should be performed routinely to identify patients at greater risk for adverse outcomes.