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The Demographic Characteristics of the Participants
| Characteristics | Case (n=650) | Control (n=650) | χ2/t | p |
|---|---|---|---|---|
| Sex (%) | 0.030 | 0.862 | ||
| Male | 418 (64.3) | 415 (63.8) | ||
| Female | 232 (35.7) | 235 (36.2) | ||
| Age | 0.688 | 0.337 | ||
| Mean ±SD | 56.91±10.17 | 56.36±10.26 | ||
| Smoking (%) | 0.030 | 0.862 | ||
| Yes | 415 (63.8) | 412 (63.4) | ||
| No | 235 (36.2) | 238 (36.6) | ||
| Pathological types | ||||
| Adenocarcinoma | 300 (46.2) | |||
| Squamous cell carcinoma | 203 (31.2) | |||
| Small cell lung cancer | 122 (18.8) | |||
| Others | 25 (3.8) |
