Characteristic | Patients | STAS(+) | STAS(-) | t/χ2 value | p-value |
---|---|---|---|---|---|
Age (years, n = 100) | 62.7±10.4 | 64.1±9.4 | 60.9±11.5 | 1.524 | 0.131 |
Sex (n=100) | Â | Â | Â | 8.431 | 0.004 |
 Male | 48 | 35 | 13 |  |  |
 Female | 52 | 23 | 29 |  |  |
CEA (ng/mL) | Â | Â | Â | 0.029 | 0.865 |
 <5 | 85 | 49 | 36 |  |  |
 ≥5 | 15 | 9 | 6 |  |  |
Clinical stage | Â | Â | Â | 11.101 | 0.004 |
 I | 84 | 41 | 43 |  |  |
 II | 16 | 15 | 1 |  |  |
 IIIA | 8 | 4 | 4 |  |  |
Smoking status (n = 100) |  |  |  | 0.004 | 0.948 |
 Never | 55 | 30 | 22 |  |  |
 Former or current | 45 | 28 | 20 |  |  |
Operation (n = 108) |  |  |  | 10.196a | 0.006 |
 Lobectomy | 72 | 45 | 27 |  |  |
 Segmentectomy | 25 | 7 | 18 |  |  |
 Wedge resection | 11 | 8 | 3 |  |  |