Health related quality of life according to St. George's Respiratory Questionnaire (SGRQ), change in forced expiratory volume in one second (FEV1) and response to four quality of life questions at 12 month follow-up
| Control group | Intervention group | Difference | 95% CI for the difference | OR | p-value | |
| Subjects n | 39 | 32 | ||||
| SGRQ total scores at the one year follow-up | 36.5±18 | 20.2±15 | 16.3 | 8.2–24.4 | 0.0002 | |
| FEV1 change in mL | −83±38 | 112±39 | 195 | 11–377 | 0.038 | |
| FEV1 change in % | −2.7±12 | 3.4±13 | 6.1 | 0.2–12.1 | 0.043 | |
| Percentage answering that they had | ||||||
| A better year | 43 | 81 | 1.8–16.5 | 5.5 | 0.002 | |
| Symptom free days | 36 | 81 | 2.4–22.7 | 7.4 | 0.001 | |
| Symptom free nights | 60 | 94 | 2.0–47.8 | 9.9 | 0.001 | |
| No impact on daily life | 62 | 88 | 1.2–14.7 | 4.3 | 0.02 | |
Data are presented as mean±sd
CI: confidence interval
independent-samples t-test
Chi-squared test
OR: odds ratio