Table 1.
Clinical characteristics of the study population.
| Variable | Lung cancer cases (n = 100) | controls (n = 100) | ||||
|---|---|---|---|---|---|---|
| SCLC (n = 25) | SqLC (n = 25) | LCLC (n = 25) | AdCa (n = 25) | |||
| Agea (years, mean, range) | 65.0 (41–85) | 61.9 (42–80) | 62.6 (40–81) | 63.0 (39–79) | 61.9 (33–89) | |
| Sex | ||||||
| male | 18 | 21 | 13 | 17 | 69 | |
| female | 7 | 4 | 12 | 8 | 31 | |
| Smoking | ||||||
| never | 1 | 0 | 2 | 3 | 24 | |
| former | 13 | 10 | 12 | 14 | 42 | |
| current | 11 | 15 | 11 | 8 | 34 | |
| Clinical tumor stage | ||||||
| IA | 4 | 4 | 6 | |||
| IB | 1 | |||||
| IIA | 1 | 5 | ||||
| IIB | 6 | 1 | ||||
| IIIA | 5 | 5 | 4 | |||
| IIIB | 4 | 2 | 1 | |||
| IV | 10 | 2 | 11 | 8 | ||
| n.a. | 7 | 4 | 3 | 6 | ||
| lymph node metastasis | 18 | 14 | 16 | 13 | ||
a At time of diagnosis.