Table 1.
Demographic characteristics of patients and controls
| Variables | Cases (N=211) | Controls (N=211) | OR (95% CI) | P-value |
|---|---|---|---|---|
| Age | ||||
| Mean age | 57.82 ± 11.74 | 56.21 ± 10.36 | 1.01 (0.996–1.031) | 0.138 |
| ≤50 years | 53 (49.5%) | 54 (50.5%) | ||
| ≥50 years | 158 (50.2%) | 157(49.8%) | 1.02 (0.661–1.590) | 0.991 |
| Gender | ||||
| Male (%) | 182 (86.3%) | 184 (87.2%) | 1.08 (0.619–1.906) | 0.774 |
| Female (%) | 29 (13.7%) | 27 (12.8%) | 0.9 (0.525–1.617) | 0.774 |
| Smoking | ||||
| Non-smokers | 68(32.2%) | 92(43.6%) | ||
| Smokers | 143 (67.8%) | 119 (56.4%) | 1.6 (1.117–2.473) | 0.01 |
| Positive family history of cancer | ||||
| No | 179 (84.8%) | 189 (89.6%) | ||
| Yes | 32 (15.2%) | 22 (10.4%) | 1.5 (0.860–2.743) | 0.147 |
| Histology | ||||
| NSCLC | 171 (81%) | |||
| SCLC | 20 (9.5%) | NA | ||
| Unclassified | 20 (9.5%) | |||
| Stage | ||||
| Stage I and II | 96 (45.5%) | |||
| Stage III and IV | 85 (40.3%) | NA | ||
| Stage unknown | 30 (14.21%) | |||
| Metastasis | ||||
| No | 170(80.6%) | |||
| Yes | 41 (19.4%) | NA | ||