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癌灶≤2 cm（T1a）的Ⅰ期NSCLC患者临床病理特征和生存相关分析
Effects of clinical characteristics on the survival time of patients with tumor extent ≤2 cm (T1a) in stage Ⅰ NSCLC
| Characteristics | n | Long survival | P |
| SML: systematic mediastinal lymphadenectomy; MLS: mediastinal lymph node sampling; NSCLC: non-small cell lung cancer. | |||
| Smoking | 0.845 | ||
| Yes | 29 | 23 | |
| No | 44 | 36 | |
| Age | 0.241 | ||
| ≤60 | 35 | 30 | |
| > 60 | 38 | 29 | |
| Sex | 0.175 | ||
| Female | 38 | 33 | |
| Male | 35 | 26 | |
| Mediastinal lymphadenectomy | 0.918 | ||
| SML | 22 | 18 | |
| MLS | 51 | 41 | |
| Visceral pleural invasion | 0.827 | ||
| Yes (Ⅰb) | 45 | 37 | |
| No (Ⅰa) | 28 | 22 | |
| Tumor differentiation | 0.010 | ||
| Moderately and well | 55 | 48 | |
| Poorly | 18 | 11 | |
| Adjuvant chemotherapy | 0.616 | ||
| Yes | 7 | 5 | |
| No | 66 | 54 | |
| Histology | 0.265 | ||
| Adenocarcinoma | 53 | 44 | |
| Squamous cell carcinoma | 13 | 11 | |
| Others | 7 | 4 | |