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Western Journal of Nursing Research
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Article

Validity and Reliability of the Chronic Heart Failure Questionnaire Mastery Subscale in Patients With Defibrillators

JinShil Kim*, Susan J. Pressler, Janet L. Welch, and William J. Groh

* To whom correspondence should be addressed. E-mail: jinshil.kim{at}hc.msu.edu.


  Abstract
Reliable, valid measures are needed to assess one’s sense of mastery, which has the potential for decreasing anxiety and depressive symptoms among patients with implantable cardioverter-defibrillators (ICDs). This study evaluates the reliability and validity of a measure of mastery, the Chronic Heart Failure Questionnaire (CHQ) mastery subscale. One hundred twenty-two (75% men, mean age 65 years) and 100 patients complete baseline and 12-month face-to-face interviews, respectively. The CHQ mastery subscale is found to have internal consistency reliability (Cronbach’s alphas = .79, .84), and its validity is supported. Factor analysis yields a single robust factor. Differences in the CHQ mastery subscale scores by the New York Heart Association (NYHA) classes are found: Patients with NYHA Class III or IV have lower mastery than those with Class I or II. Baseline younger age and less frequent ICD shocks and lower mastery are significant predictors of respectively 12-month anxiety (R2 .37) and depressive symptoms (R2 .45). The CHQ mastery subscale has demonstrated satisfactory reliability and validity in this sample.

First published on September 25, 2009
Western Journal of Nursing Research 2009, doi:10.1177/0193945909338853
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