Table 4.
Multivariate analysis of prognostic factors for relapse-free survival
| Parameter | Hazard ratio | 95% CI | p value | |
|---|---|---|---|---|
| non-COPD | Reference | |||
| Grade of COPD | GOLD-1 | 1.69 | 0.79–3.45 | 0.1693 |
| GOLD-2/3 | 2.20 | 1.07–4.48 | 0.0333 | |
| Age | ≥70 vs. <70 | 1.39 | 0.84–2.28 | 0.1976 |
| Smoking status | Current and Former vs. Never | 1.20 | 0.64–2.23 | 0.5712 |
| Smoking index, pack-years | ≥70 vs. <70 | 1.14 | 0.60–2.10 | 0.6763 |
COPD: chronic obstructive lung disease; GOLD: The Global Initiative for Chronic Obstructive Lung Disease; CI: confidence interval