Fig. 4

SF-36 summary scores by clinical characteristics- A) mMRC score, B) number of exacerbations at baseline, C) use of oxygen and D) having productive cough with sputum. Note: MCS, mental summary score, and PCS, physical summary score: mean 50 (SD=10) in the general US population. P<0.0001 for comparison of mean MCS and PCS scores by mMRC, frequency of exacerbations, and productive cough. P=0.0034 for comparison of mean MCS and <.0001 for mean PCS scores by use of oxygen