Heart FailureIncidence and Survival of Hospitalized Acute Decompensated Heart Failure in Four US Communities (from the Atherosclerosis Risk in Communities Study)
Section snippets
Methods
The 4 ARIC study communities include Forsyth County, North Carolina; Jackson, Mississippi; Minneapolis, Minnesota; and Washington County, Maryland. Average gender- and race-specific population estimates for each study community were computed for 2005 to 2009 by extrapolations from the 2000 and 2010 US censuses. The estimated population size aged ≥55 years were Forsyth County, 395,782 (20.8% black); Jackson, 171,241 (60.9% black); Minneapolis suburbs, 253,225; and Washington County, 174,414.
Results
Of the 42,413 HF-eligible hospitalizations, 41.2% were validated as ADHF, 9.0% as chronic HF, and 49.8% were classified as no HF; the most common ICD-9-CM discharge code was 428.xx (congestive HF, 89.1%). Of the validated hospitalized HF events, 82% were ADHF; 76.7% had either previous outpatient diagnosis of HF (73.4%) or treatment for HF (64.9%).
Of hospitalized ADHF events, 63.6% were incident hospitalized ADHF (53.2% of which had previous HF diagnosis) and 36.4% were recurrent events.
Discussion
We found that ADHF hospitalization rates and HF type varied by race and gender, whereas CF did not. The ARIC study is unique because it differentiates ADHF from chronic stable HF, contributing more specificity than older classification criteria (e.g., Framingham) and ICD-9-CM codes.5 In addition, the ARIC communities are relatively racially diverse allowing for evaluation of event rates among whites and blacks. Black men had the highest incidence and recurrence rates of hospitalized ADHF,
Acknowledgment
The authors thank the staff and participants of the ARIC study for their important contributions.
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The Atherosclerosis Risk in Communities Study is carried out as a collaborative study supported by National Heart, Lung, and Blood Institute (Bethesda, Maryland) contracts (HHSN268201100005 C, HHSN268201100006 C, HHSN268201100007 C, HHSN268201100008 C, HHSN268201100009 C, HHSN268201100010 C, HHSN268201100011 C, and HHSN268201100012 C).
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