Table 3.
Univariate and multivariate logistic regression analysis of clinical variables associated with recurrent exacerbations in the subsequent 1 year, in 72 COPD exacerbation patients
| Parameter | Odds ratios | 95% CI | P-value |
|---|---|---|---|
| Univariate analysis | |||
| Age | 1.023 | 0.964–1.085 | 0.456 |
| BMI | 0.998 | 0.885–1.102 | 0.824 |
| Worsened dyspnea | 2.312 | 0.2–26.708 | 0.502 |
| Increase sputum | 4.219 | 1.506–11.822 | 0.006 |
| Sputum purulence | 1.795 | 0.701–4.596 | 0.223 |
| Virus-positive | 2.363 | 0.726–7.689 | 0.153 |
| Bacteria-positive | 2.091 | 0.801–5.458 | 0.132 |
| FEV1 % predicted | 1.005 | 0.975–1.035 | 0.756 |
| Multivariate analysis | |||
| Increase sputum | 3.687 | 1.092–12.448 | 0.036 |
Abbreviations: BMI, body mass index; CI, confidence interval; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in the first second.