| Item | Number of patients without occurrence of the infection | Number of patients with occurrence of the infection | Statistical magnitude | P value |
| Gender |
|
| 0.871 | 0.351 |
| Male | 384 (67.37) | 9 (56.25) |
|
|
| Female | 186 (32.63) | 7 (43.75) |
|
|
| Age | 61.26 ± 9.87 | 64.76 ± 9.87 | 1.091 | 0.463 |
| Occupation |
|
| 0.643 | 0.587 |
| Worker | 112 (19.65) | 5 (31.25) |
|
|
| Peasant | 187 (32.81) | 4 (25.00) |
|
|
| Teacher | 117 (20.53) | 2 (12.50) |
|
|
| Others | 154 (27.02) | 5 (31.25) |
|
|
| Degree of education |
|
| 0.448 | 0.503 |
| Junior high school and below | 367 (64.39) | 9 (56.25) |
|
|
| Senior high school land above | 203 (35.61) | 7 (43.75) |
|
|
| Pathological type |
|
|
|
|
| Leukemia | 112 (19.65) | 12 (75.00) | 25.359 | <0.000* |
| Non-leukemia | 458 (80.35) | 4 (25.00) |
|
|
| Clinical staging |
|
| 1.952 | 0.162 |
| I-II | 279 (48.95) | 5 (31.25) |
|
|
| III-IV | 291 (51.05) | 11 (68.75) |
|
|
| Complications |
|
| 14.103 | <0.000* |
| YES | 95 (16.67) | 9 (56.25) |
|
|
| NO | 475 (83.33) | 7 (43.75) |
|
|
| Operation history |
|
| 0.143 | 0.202 |
| YES | 251 (44.04) | 10 (62.50) |
|
|
| NO | 319 (55.96) | 6 (37.50) |
|
|
| Use of antibacterial agents |
|
| 0.249 | 0.313 |