Abstract 16876: Measuring Thirst in Patients With Heart Failure: The Thirst Distress Scale for Patients With HF is Ready to Use!
Introduction: Some heart failure (HF) patients have severe thirst distress. However, there were no validated and reliable instruments to measure thirst distress among HF patients.
Aim: To develop an instrument to assess thirst distress in patients with HF and to evaluate its validity and reliability in an international sample.
Methods: The nine-item Thirst Distress Scale for patients with HF (TDS-HF) (5-point Likert scale, total scores 9-45) was developed from the six item TDS for patients with renal failure. This new version was translated in Swedish, Dutch and Japanese using forward- and back-translation in each country. Face and content validity was established using an expert panel, consisting of patients, nurses, cardiologists and dieticians. For further evaluation of the psychometric properties, data were collected in 272 HF patients (age 72±11 years, 67% men, 37% NYHA III-IV) in outpatient clinics and hospitals from Sweden (n=99), the Netherlands (n=101) and Japan (n=72). Validity of the TDS-HF scale was evaluated by an exploratory factor analysis, item-total and inter-item correlations, and criterion validity. Reliability was assessed by internal consistency and test-retest reliability.
Results: The total score for the TDS-HF was 18±9 (Sweden 19±9; the Netherlands 18±9; Japan 17±9). The item with the highest score was `My mouth feels dry when I am thirsty′ (mean 2.7±1.5). No ceiling and floor effects were found. The principal component analysis showed a one factor model, explaining 62% of the variance. The inter-item correlations varied between 0.44 and 0.85 and the item total correlations varied between 0.63 and 0.81. The total TDS-HF score was significantly correlated with the Visual Analogue Scale to assess the thirst intensity (r=0.56), suggesting the adequate criterion validity. Regarding reliability, Cronbach’s alpha was 0.91. The test-retest reliability was evaluated 2-4 weeks after the first survey in 25 Swedish and 52 Japanese HF patients. Intraclass correlation coefficients was 0.89. The weighted kappa values ranged from 0.29 to 0.57.
Conclusions: The Swedish, Dutch and Japanese version of TDS-HF has good psychometric properties. The TDS-HF is a useful tool for measuring thirst distress in patients with HF.
Author Disclosures: T. Jaarsma: None. N. Waldréus: None. M. van der Wal: None. N. Perkiö Kato: None.
- © 2016 by American Heart Association, Inc.