From: Long-term variability of impulse oscillometry and spirometry in stable COPD and asthma
 | COPD-All (N = 73) | COPD-GOLD1-2 (N = 23) | COPD-GOLD3 (N = 31) | COPD-GOLD4 (N = 19) | Asthma (N = 119) | P value |
---|---|---|---|---|---|---|
Age, year | 62.68 ± 9.57 | 63.04 ± 10.19 | 63.65 ± 9.20 | 60.68 ± 9.62 | 49.86 ± 14.26 | < 0.0001 |
M3-M1, month | 6.1 (3.4–16.6) | 6.1 (3.3–22.8) | 8.4 (3.0–19.0) | 4.9 (4.0–12.6) | 4.9 (4.0–12.6) |  |
BMI, kg/m2 | 22.81 ± 3.59 | 23.85 ± 3.60 | 22.72 ± 3.58 | 21.71 ± 3.41 | 23.48 ± 3.48 | 0.337 |
FVC, L | 2.02 (1.66–2.65) | 2.91 (2.07–3.50) | 2.02 (1.58–2.47) | 1.74 (1.57–2.09) | 2.88 (2.40–3.73) | < 0.0001 |
FEV1, L | 0.95 (0.72–1.29) | 1.51 (1.26–1.87) | 0.89 (0.73–1.09) | 0.69 (0.57–0.75) | 2.36 (1.86–2.82) | < 0.0001 |
MEF 50, L/s | 0.42 (0.30–0.71) | 0.90 (0.71–0.94) | 0.39 (0.31–0.54) | 0.30 (0.22–0.33) | 3.17 (2.56–4.03) | < 0.0001 |
MEF 25, L/s | 0.19 (0.14–0.25) | 0.29 (0.22–0.35) | 0.19 (0.12–0.21) | 0.15 (0.11–0.19) | 0.85 (0.52–1.17) | < 0.0001 |
MMEF 75/25, L/s | 0.37 (0.26–0.58) | 0.67 (0.60–0.80) | 0.35 (0.26–0.41) | 0.25 (0.20–0.29) | 2.16 (1.37–2.89) | < 0.0001 |
R5, cmH2O/(L/s) | 5.98 (4.64–7.64) | 4.82 (4.06–6.77) | 7.23 (5.55–8.51) | 5.83 (4.60–7.21) | 4.25 (3.13–5.11) | < 0.0001 |
R20, cmH2O/(L/s) | 3.17 (2.68–3.79) | 2.97 (2.72–3.64) | 3.63 (2.86–4.61) | 2.69 (2.10–3.48) | 3.17 (2.56–4.03) | 0.778 |
R5-R20, cmH2O/(L/s) | 2.85 (1.89–3.9) | 1.73 (0.94–3.01) | 3.60 (2.60–4.03) | 2.85 (2.48–4.04) | 0.85 (0.31–1.59) | < 0.0001 |
AX, cmH2O/L | 45.70 (21.87–61.19) | 18.76 (8.16–31.44) | 52.88 (40.08–72.50) | 49.67 (31.88–75.15) | 6.91 (3.03–12.99) | < 0.0001 |
Freq, 1/s | 28.8 (22.49–36.34) | 21.52 (16.47–27.10) | 33.99 (28.47–38.09) | 28.8 (25.85–39.99) | 16.82 (13.52–22.14) | 0.507 |
X5, cmH2O/(L/s) | − 4.57 (− 2.67–6.88) | − 1.89 (− 1.44–3.84) | − 5.82 (− 4.17–8.13) | − 5.99 (− 3.96–7.86) | − 1.44 (− 0.89–1.76) | < 0.0001 |