Features | Patient No | RCS | Â | ||
---|---|---|---|---|---|
 |  | RCS 1 | RCS 2 | RCS 3 | P |
Age (years) |  |  |  |  |  < 0.001* |
  < 60 | 90 | 52 | 33 | 5 |  |
  ≥ 60 | 64 | 18 | 32 | 14 |  |
Gender | Â | Â | Â | Â | 0.004* |
 Male | 77 | 25 | 39 | 13 |  |
 Female | 77 | 45 | 26 | 6 |  |
Type of resection | Â | Â | Â | Â | 0.788 |
 Lobectomy | 114 | 50 | 50 | 14 |  |
 Segmentectomy | 40 | 20 | 15 | 5 |  |
Micropapillary or solid component | Â | Â | Â | Â | 0.830 |
 Without or unknown | 120 | 56 | 50 | 14 |  |
 With | 34 | 14 | 15 | 5 |  |
Tobacco use history | Â | Â | Â | Â | 0.001* |
 Never | 119 | 63 | 45 | 11 |  |
 Current + former | 35 | 7 | 20 | 8 |  |
Alcohol use history | Â | Â | Â | Â | 0.972 |
 Never | 100 | 45 | 43 | 12 |  |
 Current + former | 54 | 25 | 22 | 7 |  |
Hypertension | Â | Â | Â | Â | 0.060 |
 Without | 119 | 60 | 45 | 14 |  |
 With | 35 | 10 | 20 | 5 |  |
Combined T stages | Â | Â | Â | Â | 0.004* |
 T1 | 123 | 63 | 49 | 11 |  |
 T2 | 31 | 7 | 16 | 8 |  |
TNM stages | Â | Â | Â | Â | 0.006* |
 IA | 124 | 63 | 50 | 11 |  |
 IB | 30 | 7 | 15 | 8 |  |