|Hazard Ratio||95% Confidence Interval||p Value|
|Model 1 (no adjustment)|
|KCCQ score (vs. ≥75)||<0.0001|
|Model 2 (adjustment for clinical variables⁎)|
|KCCQ score (vs. ≥75)||0.003|
|Model 3 (clinical variables and 6-min walk)|
|KCCQ score (vs. ≥75)||0.02|
KCCQ = Kansas City Cardiomyopathy Questionnaire.
↵⁎ The following clinical variables were tested and included in the model (boldface type) if they were significantly associated (p < 0.05) with event-free survival: age, gender, race, diabetes, hypertension, ejection fraction, ischemic cause of heart failure, obstructive pulmonary disease or asthma, atrial fibrillation or flutter, prior myocardial infarction, renal failure, prior stroke, systolic blood pressure, diastolic blood pressure, pulse, jugular venous distension, S3, and rales.