- Disease-specific quality of life as measured by the Chronic Respiratory Questionnaire Self-Reported (CRQ-SR) is divided into four dimensions of dyspnea, fatigue, emotional function and mastery, with a 7-point Likert scale response for each question. Dyspnea relates to a patient's symptoms of shortness of breath and difficulty breathing. Mastery relates to a patient's sense of having control over his or her disease and symptoms. Emotion relates to a patient's general mood. Fatigue relates to a patient's energy level. We measured CRQ-SR domain scores at the time of enrolment in the study and again at completion, immediately following the final session after six weeks).