Patient demographics and oscillometry parameters according to the GAP score
| GAP I (n=48) | Gap II (n=21) | Gap III (n=5) | P value | |
| Sex (M/F) | 31/17 | 15/6 | 5/0 | 0.26 |
| Age (yrs) | 71.2±8.8 | 70.5±4.9 | 70.7±8.4 | 0.94 |
| BMI (kg/m2) | 27.2±4.0 | 27.7±3.6 | 21.2±3.9 | 0.004 |
| Smoking status | ||||
| Never smoked | 17 | 6 | 2 | <0.001* |
| Ex-smoker <20 pk years | 19 | 5 | 2 | <0.001* |
| Ex-smoker ≥20 pk years | 12 | 10 | 1 | <0.001* |
| 6MW distance (% predicted) | 111±17α | 98±25β | 86±20 | 0.005 |
| R5 (cm H2O s/L) | 3.8±1.2 | 3.8±1.3 | 2.7±0.7 | 0.15 |
| R5-19 (cm H2O s/L) | 0.8±0.7 | 0.7±0.6 | 0.8±0.5 | 0.76 |
| X5 (cm H2O s/L) | −2.1±1.1 | −2.2±0.7 | −2.2±0.3 | 0.93 |
| X5in (cm H2O s/L) | −2.1±1.0 | −2.3±0.8 | −2.5±0.5 | 0.67 |
| X5ex (cm H2O s/L) | −2.1±1.3 | −2.1±0.9 | −2.0±0.3 | 0.98 |
| ΔX5 (cm H2O s/L) | −0.0±0.9 | −0.2±0.7 | −0.5±0.5 | 0.48 |
| AX (cm H2O/L) | 14.6±10.8 | 15.0±7.8 | 14.9±4.6 | 0.99 |
| Fres (Hz) | 20.1±4.6 | 20.9±3.5 | 21.3±3.1 | 0.68 |
| ReE-ReI (cm H2O s/L) | 0.8±0.6 | 1.0±0.7 | 0.4±0.2 | 0.20 |
| XeE (cm H2O s/L) | −0.4±0.8 | −0.4±0.6 | −0.5±0.4 | 0.89 |
| XeI (cm H2O s/L) | −0.6±0.4 | −0.8±0.5 | −1.1±0.4 | 0.004 |
| XeE-XeI (cm H2O s/L) | 0.2±0.7 | 0.4±0.6 | 0.6±0.6 | 0.24 |
Data are shown as mean±SD. Statistics were performed using analysis of variance. The bolded values indicate statisical significance.
α (n=47), β (n=20).
The bolded values indicate statisical significance.
*Kruskal-Wallis one-way analysis of variance.
BMI, body mass index.