text: After adjusting for age, sex, and BMI, dyspnea was 
  negatively associated with all domains of quality of life, 
  including physical functioning (coefﬁcient, (cid:3)0.655; 
  P < .001), role limitations due to physical health 
  (coefﬁcient, (cid:3)0.628; P < .001), general health 
  (coefﬁcient, (cid:3)0.382; P < .001), and total score 
  (coefﬁcient, (cid:3)0.473; P < .001) (Table 7). 