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Incidence of Heart Failure by Quartiles of Year 1 KCCQ Score
| Initial KCCQ Score Quartile | Person-Years at Risk | Events (N) | Event Rate (per 100 person-years) | 95% C.I. of Event Rate |
|---|---|---|---|---|
| I (≤74.5) | 3083 | 81 | 2.63 | 2.12 – 3.26 |
| II (74.6–91.7) | 3395 | 63 | 1.86 | 1.45 – 2.36 |
| III (91.8–99.0) | 3421 | 39 | 1.14 | 0.83 – 1.56 |
| IV (>99.0) | 3359 | 25 | 0.74 | 0.50 – 1.10 |
Abbreviations: KCCQ: Kansas City Cardiomyopathy Questionnaire; C.I.: confidence interval
