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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