Key result
6-minute walk test shows high 1-year reproducibility and tracks symptom changes in elderly HF.
Why the study?
The reproducibility and sensitivity of the 6-min walk test in elderly patients with chronic heart failure over 1 year and its implications for study design had not been described.
Is the 6-minute walk test reproducible and sensitive to self-perceived symptom changes over 1 year in elderly patients with chronic heart failure?
Comparison
6-MWT distance changes correlated with self-perceived symptom changes
Design
Observational cohort study
Follow-up
1 year
Authors
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May support 6MWT monitoring in elderly HF; extends reproducibility data but leaves open prospective validation.
Observational (n=1,077)
Is the 6-minute walk test reproducible and sensitive to self-perceived symptom changes over 1 year in elderly patients with chronic heart failure?
Effect estimate: ICC 0.80 (95% CI 0.69-0.87)
The 6-minute walk test is a reproducible and sensitive measure of functional capacity and symptom change over 1 year in elderly patients with chronic heart failure, requiring a sample size of approximately 120 to detect a 50m change with 90% power.
Ingle et al. (2005) conducted an observational in Chronic heart failure (n=1,077). 6-min walk test was evaluated on 1 year reproducibility of the 6-MWT (ICC 0.80, 95% CI 0.69-0.87). The 6-minute walk test demonstrated satisfactory 1-year reproducibility (ICC 0.80; 95% CI 0.69-0.87) and sensitivity to self-perceived symptom changes in elderly patients with chronic heart failure.
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