3. Characteristics of participants in PORT meta‐analysis.
| Characteristic | Postoperative RT | Surgery only | Total |
| AGE (data from 11 trials) | |||
| < 54 years | 294 | 327 | 621 |
| 55 to 59 years | 267 | 261 | 528 |
| 60 to 64 years | 290 | 276 | 566 |
| > 65 years | 312 | 315 | 627 |
| Unknown | 0 | 1 | 1 |
| SEX (data from 11 trials) | |||
| Male | 988 | 992 | 1980 |
| Female | 175 | 187 | 362 |
| Not recorded | 0 | 1 | 1 |
| HISTOLOGY (data from 9 trials) | |||
| Adenocarcinoma | 195 | 218 | 413 |
| Squamous | 522 | 545 | 1067 |
| Other | 66 | 54 | 120 |
| Unknown | 380 | 363 | 743 |
| META‐ANALYSIS STAGE (data from 11 trials) | |||
| I | 328 | 338 | 666 |
| II | 353 | 366 | 719 |
| III | 463 | 455 | 918 |
| IV | 1 | 0 | 1 |
| Unknown | 18 | 21 | 39 |
| WHO PERFORMANCE STATUS (data from 4 trials; not used) | |||
| Good (0, 1) | 195 | 196 | 391 |
| Poor (2, 3, 4) | 77 | 83 | 160 |
| Unknown | 22 | 21 | 43 |