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Table 5 Statistically significant relationships between the MRC chronic dyspnea score and the parameters of the 6 minute walk test (6MWT) in the study population quantified using Spearman's rank correlation coefficient

From: MRC chronic Dyspnea Scale: Relationships with cardiopulmonary exercise testing and 6-minute walk test in idiopathic pulmonary fibrosis patients: a prospective study

6MWT parameter

 

MRC score

Distance

r

-.781

 

p

<.001

SPO2 at initiation

r

-.542

 

p

.005

SPO2 at the end

r

-.713

 

p

<.001

DSPO2

r

0.634

 

p

.001

  1. SPO2 oxygen saturation, DSPO2 difference of saturation between the end and the initiation of the test, BP Blood pressure