Table 3 Univariate analysis of effect of comorbidities on prognosis.
| Parameters | HR (95% CI) |
|---|---|
| Previous tumour (present/absent) | 1.44 (1.16 to 1.78) |
| Systemic arterial high blood pressure (present/absent) | 1.30 (1.06 to 1.59) |
| FEV1 as % of theoretical value (extreme quartiles) | 1.00 (0.99 to 1.01) |
| Peripheral vascular disease (present/absent) | 1.24 (0.96 to 1.59) |
| BMI (extreme quartiles) | 1.15 (0.94 to 1.41) |
| COPD (present/absent) | 1.13 (0.80 to 1.59) |
| Ischaemic heart disease (present/absent) | 0.98 (0.73 to 1.32) |
| Diabetes mellitus (present/absent) | 1.17 (0.89 to 1.54) |
FEV1, forced expiratory volume in 1 s; BMI, body mass index; COPD, chronic obstructive pulmonary disease.