Elsevier

American Heart Journal

Volume 191, September 2017, Pages 75-81
American Heart Journal

Clinical Investigation
Multinational and multiethnic variations in health-related quality of life in patients with chronic heart failure

https://doi.org/10.1016/j.ahj.2017.06.016Get rights and content

Background

Assessing health-related quality of life (HRQoL) in patients with heart failure (HF) is an important goal of clinical care and HF research. We sought to investigate ethnic differences in perceived HRQoL and its association with mortality among patients with HF and left ventricular ejection fraction ≤35%, controlling for demographic characteristics and HF severity.

Methods and results

We compared 5697 chronic HF patients of Indian (26%), white (23%), Chinese (17%), Japanese/Koreans (12%), black (12%), and Malay (10%) ethnicities from the HF-ACTION and ASIAN-HF multinational studies using the Kansas City Cardiomyopathy Questionnaire (KCCQ; range 0-100; higher scores reflect better health status). KCCQ scores were lowest in Malay (58 ± 22) and Chinese (60 ± 23), intermediate in black (64 ± 21) and Indian (65 ± 23), and highest in white (67 ± 20) and Japanese or Korean patients (67 ± 22) after adjusting for age, sex, educational status, HF severity, and risk factors. Self-efficacy, which measures confidence in the ability to manage symptoms, was lower in all Asian ethnicities (especially Japanese/Koreans [60 ± 26], Malay [66 ± 23], and Chinese [64 ± 28]) compared to black (80 ± 21) and white (82 ± 19) patients, even after multivariable adjustment (P < .001). In all ethnicities, KCCQ strongly predicted 1-year mortality (HR 0.45, 95% CI 0.30-0.67 for highest vs lowest quintile of KCCQ; P for interaction by ethnicity .101).

Conclusions

Overall, HRQoL is inversely and independently related to mortality in chronic HF but is not modified by ethnicity. Nevertheless, ethnic differences exist independent of HF severity and comorbidities. These data may have important implications for future global clinical HF trials that use patient-reported outcomes as endpoints.

Section snippets

Methods

For the current analysis, we combined the participants from HF-ACTION (N = 1998) and the ASIAN-HF registry (N = 3699) with left ventricular ejection fraction (EF) ≤35% to form a combined cohort of 5697 patients. The trial design and results of HF-ACTION have been previously reported.12., 13. This multicenter, randomized controlled trial compared the long-term safety and efficacy of exercise training plus evidence-based HF medical therapy versus medical therapy alone in patients with HFrEF (EF ≤35%)

Results

In the combined cohort of 5697 participants, the median age was 60 (IQR 51-68) years, and 24% were women; baseline characteristics of the cohort by ethnicity are shown in Table II. In general, disease characteristics and comorbidities varied among the ethnic groups. Black or African American (median age 55) and Malay participants (median age 56) were the youngest, while white (median age 62) and Japanese/Korean (median age 67) participants were the oldest. Malay participants had the highest

Discussion

To our knowledge, these data represent the largest analysis of cross-continental ethnic differences in HRQoL among patients with chronic HF. Despite acknowledgement of the large and growing global public health burden of HF, substantial knowledge and care gaps exist, especially among low- and middle-income regions of Asia, where resources are particularly limited.23., 24. In this study, we show that—independent of clinical covariates—HRQoL as defined by the patient's KCCQ score is significantly

Disclosures

The authors report no relevant disclosures.

Acknowledgements

We thank all investigators and participants of HF-ACTION and ASIAN-HF for their contribution.

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    Larry A Allen, MD, MHS served as guest editor for this article.

    Clinical trial registration: NCT00047437 and NCT01633398

    1

    Co–primary authors.

    2

    The complete list of investigators is reported in the Supplementary material.

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