From: Relationship between diffusion capacity and small airway abnormality in COPDGene
GOLD spirometry grade | |||
---|---|---|---|
0 (n = 957) | 1–2 (n = 584) | 3–4 (n = 305) | |
Age, yr | 63.5 | 68.3 | 68.9 |
Sex, n (% female) | 512 (54%) | 249 (42%) | 130 (43%) |
BMI (kg/m2) | 28.9 | 27.9 | 27.5 |
Smoking pack-years | 37.1 | 49.8 | 55.0 |
Current smokers, n (%) | 344 (36%) | 212 (36%) | 61 (20%) |
Exacerbations in prior year | 0.11 | 0.32 | 0.71 |
FEV1, L | 2.73 | 2.03 | 0.98 |
FEV1% predicted | 98.4 | 73.3 | 36.4 |
FVC, L | 3.49 | 3.39 | 2.43 |
FVC % predicted | 96.1 | 91.7 | 67.2 |
FEV1/FVC | 0.78 | 0.60 | 0.41 |
DLCO, % predicted | 90.1% | 74.2% | 51.2% |
DLCO, GLI z-score | −0.73 | −1.91 | −4.08 |
PRMfSAD | 10.0% | 21.0% | 34.6% |
PRMEmph | 1.8% | 6.5% | 18.3% |