Demographic characteristics of patients consistently reversible and irreversible using ATS and ERS criteria
| ATS response (n=103) | ATS no response (n=213) | Difference (p value) | ERS response (n=32) | ERS no response (n=375) | Difference (p value) | |
|---|---|---|---|---|---|---|
| Values are mean (SE). | ||||||
| FEV1=forced expiratory volume in 1 second; ICS=inhaled corticosteroids. | ||||||
| Post-bronchodilator FEV1 (l) | 1.60 (0.04) | 1.35 (0.03) | <0.0001 | 1.70 (0.07) | 1.37 (0.02) | <0.0001 |
| Change in FEV1 (l) | 0.34 (0.01) | 0.09 (0.01) | 0.37 (0.02) | 0.13 (0.01) | ||
| Change in FEV1 (% predicted) | 11.17 (0.29) | 3.60 (0.21) | 13.13 (0.48) | 4.60 (0.17) | ||
| % women | 12 | 38 | <0.0001 | 25 | 24 | 0.9 |
| % smokers | 48 | 47 | >0.9 | 47 | 48 | 0.9 |
| % atopic | 32 | 24 | 0.1 | 28 | 24 | 0.6 |
| % previous regular ICS | 61 | 51 | 0.1 | 66 | 51 | 0.1 |