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  • Title: Grading of dyspnoea and walking speed in cardiac disease and in chronic airflow obstruction.
    Author: Warley AR, Finnegan OC, Nicholson EM, Laszlo G.
    Journal: Br J Dis Chest; 1987 Oct; 81(4):349-55. PubMed ID: 3449121.
    Abstract:
    A five-point dyspnoea scale (modified MRC questionnaire) and 12-minute walking test were used to compare the relationship between subjective assessment of dyspnoea and objective measurement of disability in patients with chronic airflow limitation, cardiac disease, and normal subjects. There was no overall difference in exercise performance between the cardiac and respiratory groups. There was a significant correlation between vital capacity and exercise performance, and the slope of the regression line was similar in the two groups. There was no correlation between vital capacity and exercise performance in the group of normal subjects. The five-point dyspnoea scale predicts similar levels of performance in the 12-minute walking test whether the dyspnoea is a result of cardiac or respiratory disease.
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