Figure 2From: The minimal important difference of the pulmonary functional status and dyspnea questionnaire in patients with severe chronic obstructive pulmonary disease Relationship between changes in activity domain score of PFSDQ-M and 6MWD (2A; r = −0.30, p < 0.001) and CRDQ total scores (2B; r = −0.42, p < 0.001) after the rehabilitation program. Back to article page