Table 1.
Clinicopathological characteristics of the patient cohort
| Parameter | Patients | ||
|---|---|---|---|
| Number | Percent | ||
| Gender | Male | 116 | 53 |
| Female | 101 | 47 | |
| Age at surgery | < 65 years | 100 | 46 |
| > 65 years | 117 | 54 | |
| Histology | Adenocarcinoma (incl. BAC) | 132 | 61 |
| Squamous cell carcinoma | 60 | 28 | |
| Large cell carcinoma | 25 | 11 | |
| Differentiation | G1 (well differentiated) | 18 | 9 |
| G2 (moderately differentiated) | 138 | 69 | |
| G3 (poorly differentiated) | 45 | 22 | |
| Missing | 16 | ||
| pTNM | I | 135 | 63 |
| II | 42 | 19 | |
| III | 35 | 16 | |
| IV | 4 | 2 | |
| Missing* | 1 | ||
| pT | pT1 | 68 | 31 |
| pT2 | 120 | 56 | |
| pT3 | 17 | 8 | |
| pT4 | 11 | 5 | |
| Missing* | 1 | ||
| pN | 0 | 157 | 73 |
| 1 | 38 | 17 | |
| 2 | 21 | 10 | |
| Missing* | 1 | ||
| pM | 0 | 212 | 98 |
| 1 | 4 | 2 | |
| Missing* | 1 | ||
| Tumor size | < 2.0 cm | 58 | 27 |
| 2.1-3.0 cm | 62 | 29 | |
| 3.1-5.0 cm | 65 | 30 | |
| 5.1-7.0 cm | 23 | 10 | |
| > 7.0 cm | 8 | 4 | |
| Missing* | 1 | ||
| Surgery | Lobectomy | 147 | 68 |
| Pulmectomy | 26 | 12 | |
| Wedge resection | 17 | 8 | |
| Bilobectomy | 17 | 8 | |
| Other | 10 | 4 | |
| Tobacco use | Current smoker | 74 | 34 |
| Former smoker | 129 | 60 | |
| Never smoker | 14 | 6 | |
* TNM stage missing in one patient due to exploratory surgery.