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| Controls, n (%) | Cases, n (%) | P | |
|---|---|---|---|
| Total subjects | 337 (100%) | 391 (100%) | |
| Gender | 0.969 | ||
| Male | 228 (67.7%) | 264 (67.5%) | |
| Female | 109 (32.3%) | 127 (32.5%) | |
| Age | |||
| Mean ± SD | 38.8 ± 10.7 | 58.63 ± 8.8 | 0.000 |
| Tumor type | |||
| Squamous | 107 (27.4%) | ||
| SCLC | 64 (16.4%) | ||
| Adenocarcinoma | 183 (46.8%) | ||
| Other | 37 (9.5%) |
