Table 1 Baseline characteristics of 1260 laryngeal cancer patients divided by different ABO blood groups
From: ABO blood group is a predictor of survival in patients with laryngeal cancer
| Characteristic | Total | ABO blood group [cases (%)] | χ2 | P | |||
|---|---|---|---|---|---|---|---|
| A (n = 347) | B (n = 332) | AB (n = 101) | O (n = 480) | ||||
| Sex | 1.576 | 0.665 | |||||
| Men | 1226 | 338 (27.6) | 320 (26.1) | 99 (8.1) | 469 (38.2) | ||
| Women | 34 | 9 (26.5) | 12 (35.3) | 2 (5.9) | 11 (32.3) | ||
| Age (years)a | 2.122 | 0.547 | |||||
| ≤61 | 661 | 176 (26.6) | 168 (25.4) | 53 (8.0) | 264 (40.0) | ||
| >61 | 599 | 171 (28.5) | 164 (27.4) | 48 (8.0) | 216 (36.1) | ||
| Smoking indexb | 4.010 | 0.260 | |||||
| ≤600 | 659 | 191 (29.0) | 178 (27.0) | 45 (6.8) | 245 (37.2) | ||
| >600 | 601 | 156 (26.0) | 154 (25.6) | 56 (9.3) | 235 (39.1) | ||
| Alcohol consumption | 4.899 | 0.179 | |||||
| No | 808 | 219 (27.1) | 226 (28.0) | 69 (8.5) | 294 (36.4) | ||
| Yes | 452 | 128 (28.3) | 106 (23.5) | 32 (7.1) | 186 (41.1) | ||
| Tumor differentiation | 3.452 | 0.750 | |||||
| Well | 600 | 170 (28.4) | 149 (24.8) | 54 (9.0) | 227 (37.8) | ||
| Moderate | 481 | 132 (27.4) | 134 (27.9) | 32 (6.7) | 183 (38.0) | ||
| Poor | 179 | 45 (25.1) | 49 (27.4) | 15 (8.4) | 70 (39.1) | ||
| Primary site | 16.755 | 0.010 | |||||
| Glottic | 885 | 244 (27.6) | 242 (27.3) | 79 (8.9) | 320 (36.2) | ||
| Supraglottic | 331 | 83 (25.1) | 82 (24.8) | 22 (6.6) | 144 (43.5) | ||
| Subglottic | 44 | 20 (45.5) | 8 (18.2) | 0 (0) | 16 (36.3) | ||
| T category | 7.212 | 0.615 | |||||
| T1 | 434 | 119 (27.4) | 123 (28.4) | 31 (7.1) | 161 (37.1) | ||
| T2 | 382 | 115 (30.1) | 94 (24.6) | 31 (8.1) | 142 (37.2) | ||
| T3 | 244 | 58 (23.8) | 65 (26.6) | 26 (10.7) | 95 (38.9) | ||
| T4 | 200 | 55 (27.5) | 50 (25.0) | 13 (6.5) | 82 (41.0) | ||
| N category | 2.319 | 0.509 | |||||
| N0 | 1021 | 289 (28.3) | 269 (26.3) | 83 (8.1) | 380 (37.2) | ||
| N+ | 239 | 58 (24.3) | 63 (26.4) | 18 (7.5) | 100 (41.8) | ||
| UICC stage | 9.077 | 0.430 | |||||
| I | 421 | 118 (28.0) | 118 (28.0) | 29 (6.9) | 156 (37.1) | ||
| II | 326 | 101 (31.0) | 77 (23.6) | 27 (8.3) | 121 (37.1) | ||
| III | 242 | 54 (22.3) | 66 (27.3) | 26 (10.7) | 96 (39.7) | ||
| IV | 271 | 74 (27.3) | 71 (26.2) | 19 (7.0) | 107 (39.5) | ||