Key result
Transition and serial static dyspnea measures fail to validate each other in acute heart failure.
Why the study?
The convergent validity between transition measures and change measures of dyspnea in patients admitted to the hospital with acute decompensated heart failure needed assessment.
Do short-term transition measures and serial static/change measures of dyspnea demonstrate convergent validity in patients admitted with acute decompensated heart failure?
Observational (n=112)
Do short-term transition measures and serial static/change measures of dyspnea demonstrate convergent validity in patients admitted with acute decompensated heart failure?
Transition measures and serial static change measures of dyspnea do not validate each other for short-term symptom assessment in patients hospitalized with acute decompensated heart failure.
Answers are grounded in this paper and cite their sources.
May support interchangeable dyspnea measures in ADHF; leaves open outcome validation in prospective cohorts.
This study assessed the convergent validity of 2 dyspnea measures, the transition measure and the change measure, by comparing them with each other in patients admitted to the hospital with acute decompensated heart failure. Static measures of dyspnea were obtained at baseline (pre-static measure) and at time 1 hour and 4 hour (post-static measures). The change measure was calculated as the difference between the pre-static and post-static measures. Transition measures were obtained at time 1 hour and 4 hour. Visual analog scales and Likert scales were used. Both physicians and patients measured the dyspnea independently. A total of 112 patients had complete data sets at time 0 and 1 hour and 86 patients had complete data sets at all 3 time points. Correlations were calculated between the transition measures and static measures (pre-static, post-static, and change measure). Bland-Altman plots were generated and the mean difference and limits of agreement between the transition measures and the change measures were calculated. In general, short-term dyspnea assessment using transition measures and serial static measures can not be used to validate each other in this population of patients being admitted with acute decompensated heart failure.
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Smithline et al. (2010) conducted an observational in Acute decompensated heart failure (n=112). Transition measure of dyspnea (visual analog and Likert scales at 1 and 4 hours) vs. Static and change measures of dyspnea (pre-static at baseline, post-static at 1 and 4 hours) was evaluated on Convergent validity (correlations, mean difference, and limits of agreement) between transition and static/change measures of dyspnea. Short-term dyspnea assessment using transition measures and serial static measures in 112 acute heart failure patients (86 complete at 4 hours) could not be used to validate each other.
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