Relationship between deterioration in St Georges Respiratory Questionnaire (SGRQ) score, forced expiratory volume in one second (FEV1) decline and treatment
| FEV1 decline mL·yr−1·1 unit SGRQ−1 | SGRQ score mean units·yr−1 | p-value | |
| FEV1 decline rate | −6.3 | <0.0001 | |
| Treatment | |||
| FP | 2.3 | 0.02 | |
| Placebo | 2.7 | ||
| FEV1 decline * treatment | 0.2 |
FP: fluticasone proprionate