Table 2.
Forced expiratory volume during the first second at baseline of the study by participants’ GOLD class and risk group.
| GOLDa | A: MRCb score <2; 0-1 exacerbations per year, mean (SD) | B: MRC score ≥2; 0-1 exacerbations per year, mean (SD) | C: MRC score 0-1; ≥2 exacerbations per year, mean (SD) | D: MRC score ≥2; ≥2 exacerbations per year, mean (SD) | Total |
| I: FEV1c≥80% predicted | —d | — | — | 1.46, n=1 | 1 |
| II: 50%≤FEV1<80% predicted | 1.47 (0.46), n=11 | 1.52 (0.46), n=23 | 1.49 (0.05), n=3 | 0.86 (0.26), n=4 | 41 |
| III: 30%≤FEV1<50% predicted | — | 1.28, n=1 | 1.10 (0.08), n=8 | 0.74 (0.22), n=16 | 25 |
| IV: FEV1<30% predicted | — | — | 0.97 (0.05), n=2 | 0.67 (0.3), n=18 | 20 |
| Total | 11 | 24 | 13 | 39 | 87 |
aGOLD: Global Initiative on Chronic Obstructive Lung Disease.
bMRC: Medical Research Council.
cFEV1: Forced expiratory volume during the first second.
dNot applicable.