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
-.542
.005
SPO2 at the end
-.713
DSPO2
0.634
.001