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Patient information.
| Variable | Number |
|---|---|
| Gender (female/male) | 166/142 |
| TNM stage (stage I/stage II) | 212/96 |
| Lymph node metastasis (positive/negative) | 61/247 |
| Age (> 60/≤ 60/missing) | 221/78/9 |
| KRAS status (WT/MUT) | 210/98 |
| EGFR status (WT/MUT) | 271/37 |
| Smoking (no/yes/missing) | 15/93/200 |
