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两组患者临床特征
Comparison of clinical characteristics between physical examination group and symptomatic group
| PEG (n=131) | SG (n=374) | P | |
| PEG: physical examination group; SG: symptomatic group. | |||
| Age (yr, Mean±SD) | 59.6±10.2 | 58.7±10.1 | 0.406 |
| Gender | 0.044 | ||
| Male | 74 (56.5) | 248 (66.3) | |
| Female | 57 (43.5) | 126 (33.7) | |
| Smoking | 0.071 | ||
| Current or ever | 57 (43.5) | 197 (47.3) | |
| Never | 74 (56.5) | 177 (52.7) | |
| Place of residence | < 0.001 | ||
| City | 81 (61.8) | 148 (39.6) | |
| Township | 50 (38.2) | 226 (60.4) | |
