Table 1:
Clinical characteristics of patients undergoing major lung resection
| Category | Evaluable patients | Value (±standard deviation) or number affected (percent) |
|---|---|---|
| Male gender | 1369 | 703 (51) |
| Age at operation (years) | 1369 | 62 ± 11 |
| Serum creatinine (mg/dl) | 1127 | 1 ± 1 |
| Hypertension | 1367 | 568 (42) |
| Coronary artery disease | 1368 | 281 (21) |
| Diabetes mellitus | 1368 | 197 (14) |
| Any tobacco use | 1367 | 1184 (87) |
| PS 0–1 | 1351 | 1183 (88) |
| BMI | 1366 | |
| Underweight (<18.5) | 64 (5) | |
| Normal (18.5–24.9) | 489 (36) | |
| Overweight (25–29.9) | 489 (36) | |
| Obese (30–34.9) | 193 (14) | |
| Very obese (≥35) | 131 (10) | |
| FEV1% | 1318 | 84 ± 22 |
| ppoFEV1% | 1318 | 64 ± 20 |
| DLCO% | 1240 | 85 ± 22 |
| ppoDLCO% | 1240 | 64 ± 19 |
| Pretreatment clinical stage | 1145 | |
| I | 587 (51) | |
| II | 286 (25) | |
| III | 250 (22) | |
| IV | 22 (2) | |
| Induction chemotherapy | 1302 | 125 (10) |
| Induction radiation therapy | 1307 | 131 (10) |
FEV1: forced expiratory volume in 1 s; DLCO: diffusing capacity of the lung for carbon monoxide; ppo: predicted postoperative value