Result of CAT, mMRC, exacerbations last year and ventilation function before and after intervention Intervention Indexes Before (n=139) After (n=139) p n% n% mMRC ≤ 1 74 53.2 93 66.9 < 0.05 CAT < 10 26 18.7 26 18.7 > 0.05 No exacerbation 75 54.0 89 64.0 > 0.05 Means of mMRC 1.47 ± 1.07 1.17 ± 0.97 < 0.05 Means of CAT 17.69 ± 5.87 16.14 ± 4.88 < 0.05 Exacerbations 0.76 ± 0.96 0.52 ± 0.81 < 0.05 Means of FEV1% 59.96 ± 22.13 58.33 ± 22.12 > 0.05 Comments: after the intervention, means of CAT, mMRC, exacerbations reduced significantly, and means of FEV1% changed negligibly.