Table 4.
Multivariate logistic regression analysis used to evaluate the associations between the forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) that was determined using Spirobank Smart, patients characteristic variables, and chronic obstructive pulmonary disease (COPD) incidence.
| Variables | Crude OR (95% CI) | p-Value | Adjusted OR (95% CI) | p-Value |
|---|---|---|---|---|
| Portable spirometer: FEV1/FVC< 74% | 55.14 (28.13–108.77) | <0.001 | 58.58 (27.29–125.75) | <0.001 |
| Smoking PY ≥ 50 | 2.28 (1.37–3.78) | 0.001 | 1.31 (0.57–2.98) | 0.535 |
| Age category | ||||
| Age < 55 | 1 | 1 | ||
| 55 ≤ age < 60 | 1.07 (0.44–2.59) | 0.864 | 1.12 (0.32–3.886) | 0.864 |
| 60 ≤ age < 65 | 1.66 (0.79–3.51) | 0.185 | 3.23 (1.04–10.07) | 0.04 |
| Age ≥ 65 | 4.56 (2.45–8.48) | <0.001 | 5.82 (2.22–15.27) | <0.001 |
| CAT category | ||||
| 0–9 | 1 | 1 | ||
| 10–19 | 1.74 (1.07–2.85) | 0.027 | 1.39 (0.65–2.98) | 0.393 |
| 20–29 | 4.65 (2.03–10.67) | <0.001 | 3.43 (0.99–11.29) | 0.052 |
| 30–40 | 3.72 (0.23–60.71) | 0.356 | 5.89 (0.06–613.56) | 0.535 |
| BMI | 0.907 (0.85–0.97) | 0.002 | ||
| Gender (male) | 0.759 (0.30–1.94) | 0.759 |