Table 3.
Logistic regression analyses of respiratory impedance for ACO.
| Variables | Univariate | Multivariate | ||
|---|---|---|---|---|
| Odds ratio | p-value | Odds ratio | p-value | |
| Age, per 1-year increase | 0.99 (0.95–1.03) | 0.638 | 0.99 (0.94–1.04) | 0.695 |
| Sex: female | 2.59 (0.81–8.58) | 0.107 | 0.84 (0.20–3.41) | 0.806 |
| R5avg., per 1 cm H2O/L/s increase | 1.37 (1.08–1.79) | 0.014 | 2.17 (1.28–3.88) | 0.004 |
| Δ(R5–R20), per 1 cm H2O/L/s increase | 0.25 (0.08–0.67) | 0.010 | 0.06 (0.01–0.28) | <0.001 |
| X5avg., per 1 cm H2O/L/s increase | 0.72 (0.54–0.92) | 0.015 | 1.24 (0.73–2.11) | 0.429 |
Data are expressed as odds ratios (95% confident intervals). R5, respiratory resistance at 5 Hz; R 20, respiratory resistance at 20 Hz; X5, respiratory reactance at 5 Hz; avg., average value of the inspiratory and expiratory phases; Δ, gap between the inspiratory and expiratory phases.