| Variables | CVC | P-value | |
| Hospital level 2 | Hospital level 3 | ||
| CVC Development Yes No |
126 (61.2%) 80 (38.8%) |
76 (98.7%) 1 (1.3%) |
0.000 |
| Ultrasound-guided catheterization |
|
|
|
| Completely | 26 (20.6%) | 24 (31.6%) | 0.037 |
| Partially | 47 (37.3%) | 33 (43.4%) | |
| No | 53 (42.1%) | 19 (25.0%) | |
| Catheterization environment |
|
|
|
| Bedside of patients in the general ward | 41 (32.5%) | 37 (48.7%) | 0.022 |
| The general ward treatment room | 35 (27.8%) | 33 (43.4%) | 0.023 |
| Operation room | 94 (74.6%) | 65 (85.5%) | 0.066 |
| ICU | 78 (61.9%) | 64 (84.2%) | 0.001 |
| Others | 7 (5.6%) | 6 (7.9%) | 0.512 |
| Maximal sterile barrier |
|
|
|
| Completely | 78 (61.9%) | 49 (64.5%) | 0.156 |
| Partially | 48 (38.1%) | 25 (32.9%) | |
| No | 0 (0.0%) | 2 (2.6%) | |