Table 8 Association between IOS values and FEV1 according to GOLD stages
GOLD stage | 1 FEV1 ≥80%; N=126 | 2 FEV1: 50-79.9%; N=187 | 3 FEV1: 30-49.9%; N=41 | 4 FEV1 <30%; N=7 |
|---|---|---|---|---|
R5% | 104.9 (30.6) | 134.4 (41.0) | 176.0 (48.7) | 204.4 (70.2) |
R20, kPa/L/s | 0.31 (0.06) | 0.35 (0.08) | 0.36 (0.08) | 0.33 (0.10) |
R5-20, kPa/L/s | 0.06 (0.07) | 0.14 (0.10) | 0.28 (0.16) | 0.33 (0.16) |
AX, kPa/L | 0.60 (0.73) | 1.52 (1.26) | 3.40 (1.97) | 4.63 (2.20) |
Fres, Hz | 14.4 (5.5) | 20.4 (6.6) | 26.4 (5.3) | 30.7 (3.7) |
BMI, kg/m2 | 26.9 (4.9) | 28.1 (6.1) | 28.7 (7.0) | 26.7 (5.9) |