Variables | Number (%) | Five-year RFS% | P-value by log-rank test |
---|---|---|---|
Age | Â | Â | Â |
  ≤ 65 | 97 | 83.7% | 0.520 |
  > 65 | 80 | 83.5% | |
Sex | Â | Â | Â |
  Male | 79 | 84.1% | 0.855 |
  Female | 98 | 83.4% | |
Smoking history | Â | Â | Â |
  Never-smoked | 128 | 81.7% | 0.424 |
  Smoker | 49 | 88.7% | |
Tumor size | Â | Â | Â |
  ≤ 1 cm | 21 | 95.2% | 0.231 |
  > 1 to ≤ 2 cm | 156 | 82.2% | |
LVI | Â | Â | Â |
  Absent | 135 | 87.5% | 0.012 |
  Present | 42 | 72.1% | |
Histological grading | Â | Â | Â |
  Well differentiated | 78 | 85.4% | 0.535 |
  Moderately differentiated | 66 | 82.0% | |
  Poorly differentiated | 33 | 83.0% | |
Predominant subtypes | Â | Â | Â |
  Lepidic | 45 | 94.9% | 0.022 |
  Acinar | 58 | 83.1% | |
  Papillary | 37 | 91.9% | |
  Solid | 18 | 67.4% | |
  Micropapillary | 19 | 57.6% |  |