| Variable | Blood infection rate Adjusted OR (95% CI) | Urinary tract infection rate Adjusted OR (95% CI) | VAP infection rate Adjusted OR (95% CI) |
| Number of patients/each nurse | 0.91 (0.74 - 1.06) | 1.78 (1.17 - 2.35) | 1.17 (0.94 - 1.47) |