Table 1. Patient characteristics.
| All | Blood group | ||||||||||
| Group O | Group A | Group B | Group AB | P value | |||||||
| n = 333 |
n = 108 (32.4%) |
% |
n = 140 (42.1%) |
% |
n = 59 (17.7%) |
% |
n = 26 (7.8%) |
% | |||
| Age, median (range) | 68 (31–85) | 68 (40–84) | 68 (31–85) | 67 (40–85) | 71 (40–83) | 0.511 | |||||
| Sex | Female | 115 | 38 | 35.2 | 55 | 39.3 | 13 | 22 | 9 | 34.6 | 0.128 |
| Male | 218 | 70 | 64.9 | 85 | 60.7 | 46 | 78 | 17 | 65.4 | ||
| Smoking status | Never | 93 | 31 | 28.7 | 43 | 30.7 | 13 | 22 | 6 | 23.1 | 0.585 |
| Ever/Current | 237 | 76 | 70.4 | 95 | 67.9 | 46 | 78 | 20 | 76.9 | ||
| Unknown | 3 | 1 | 0.9 | 2 | 1.4 | 0 | 0 | ||||
| CEA (ng/mL) | ≤5 | 219 | 73 | 67.6 | 90 | 64.3 | 39 | 66.1 | 17 | 65.4 | 0.986 |
| >5 | 103 | 34 | 31.5 | 41 | 29.3 | 19 | 32.2 | 9 | 34.6 | ||
| Unknown | 11 | 1 | 0.9 | 9 | 6.4 | 1 | 1.7 | 0 | |||
| Operative procedure | Wedge/Seg | 37 | 6 | 5.4 | 25 | 17.9 | 5 | 8.5 | 1 | 3.8 | 0.044 |
| Lob | 276 | 97 | 90 | 107 | 76.4 | 49 | 83 | 23 | 88.5 | ||
| Pn | 20 | 5 | 4.6 | 8 | 5.7 | 5 | 8.5 | 2 | 7.7 | ||
| Histology | AD | 210 | 60 | 55.6 | 94 | 67.1 | 37 | 62.7 | 19 | 73.1 | 0.353 |
| SQ | 93 | 34 | 31.5 | 34 | 24.3 | 19 | 32.2 | 6 | 23.1 | ||
| Others | 30 | 14 | 12.9 | 12 | 8.6 | 3 | 5.1 | 1 | 3.8 | ||
| p-stage | I | 227 | 72 | 66.7 | 98 | 70 | 37 | 62.7 | 20 | 77 | 0.037 |
| II | 49 | 10 | 9.3 | 20 | 14.3 | 16 | 27.1 | 3 | 11.5 | ||
| III | 57 | 26 | 24 | 22 | 15.7 | 6 | 10.2 | 3 | 11.5 | ||
| Adjuvant therapy | No | 265 | 81 | 75 | 113 | 80.7 | 52 | 88.1 | 19 | 73.1 | 0.17 |
| Yes | 68 | 27 | 25 | 27 | 19.3 | 7 | 11.9 | 7 | 26.9 | ||
AD, adenocarcinoma; CEA, carcinoembryonic antigen; Lob, lobectomy; Pn, pneumonectomy; p-stage, pathological stage; Seg, segmentectomy; SQ, squamous cell carcinoma; Wedge, wedge resection.