Table 1.
Baseline Characteristics of 571 Tissue Samples
| Variable | Value |
|---|---|
| Age | |
| Median | 61 |
| Range | 31-84 |
| Sex | |
| Male | 424 |
| Female | 147 |
| Tumor type | |
| SCC | 293 |
| ADC | 278 |
| Tumor stagea | |
| I | 182 |
| II | 220 |
| III+IV | 169 |
| T status | |
| T1 | 71 |
| T2 | 366 |
| T3 | 95 |
| T4 | 39 |
| N status | |
| N0 | 297 |
| N1-3 | 274 |
| M status | |
| M0 | 560 |
| M1 | 11 |
| Tumor differentiation | |
| Well | 30 |
| Moderate | 260 |
| Poorly | 281 |
| Gross pathology | |
| Central-type | 307 |
| Peripheral-type | 264 |
| Smoking status | |
| Current or former smoker | 390 |
| Nonsmoker | 78 |
| Family historyb | |
| Lung cancer | 48 |
| No | 447 |
a Tumor stage was classified according to the 7th edition of the International Union against Cancer (UICC) Tumor Node Metastasis (TNM) classification of malignant tumors.
b Family history of lung cancer in a first-degree relative.