The characteristics of the study patients by late complications and results of the multivariate Cox regression analysis
| Multivariate Cox regression# | ||
| Hazard ratio (95% CI) | p-value | |
| RPO | 2.26 (1.23–4.16) | 0.009 |
| Unprovoked pulmonary embolism | 2.15 (1.07–4.33) | 0.03 |
RPO: residual pulmonary obstruction. #: age, unprovoked pulmonary embolism and RPO were included in the multivariate Cox regression model.