Table 1:
Preoperative characteristics of study population
| Category | Evaluable patients | Mean (SD) or percent affected |
|---|---|---|
| Male gender | 854 | 55% |
| Age at operation (years) | 853 | 63.0 (10.2) |
| Serum creatinine (mg/dl) | 629 | 1.1 (1.0) |
| Serum haemoglobin (g/dl) | 661 | 13.1 (1.6) |
| Serum albumin (g/dl) | 582 | 4.0 (0.4) |
| Hypertension | 848 | 40.6% |
| Body mass index <18.5 | 810 | 4.9% |
| Prior myocardial infarction | 837 | 10.9% |
| Diabetes mellitus | 846 | 14.3% |
| Any tobacco use | 849 | 91.8% |
| Performance status 0–1 | 834 | 83.7% |
| FEV1% | 807 | 81.8 (21.3) |
| DLCO% | 748 | 83.9 (22.2) |
| Pretreatment clinical stage | 853 | |
| I | 53.9% | |
| II | 19.6% | |
| III | 25.0% | |
| IV | 1.5% | |
| Induction chemotherapy | 776 | 8.5% |
| Induction radiation therapy | 783 | 10.6% |
FEV1: forced expiratory capacity in the first second; DLCO: diffusing capacity of the lung for carbon monoxide.