Table 1 Characteristics of the ICU quality improvement factors
Categories | Variables | N | Q1 | Median | Q3 | Extreme value |
|---|---|---|---|---|---|---|
Structure factors | Patient-to-bed ratio | 1267 | 27.59 | 37.64 | 51.55 | 3.19–252.20 |
|  | Physician-to-bed ratio | 1267 | 0.44 | 0.58 | 0.75 | 0.12–3.19 |
|  | Nurse-to-bed ratio | 1267 | 1.50 | 1.88 | 2.31 | 0.60–4.56 |
|  | Patient-to-physician ratio | 1267 | 45.63 | 64.25 | 90.25 | 6.03–541.17 |
|  | Patient-to-nurse ratio | 1267 | 14.4 | 20.2 | 28.62 | 2.28–99.91 |
Process factors | Unplanned endotracheal extubation rate (%) | 1267 | 0 | 0.83 | 2.14 | 0–96.95 |
|  | Reintubation rate in 48 h (%) | 1267 | 0.74 | 1.76 | 3.52 | 0–65.17 |
|  | Microbiology detection rate before antibiotic use (%) | 1267 | 75.00 | 92.86 | 100 | 0.98–100 |
Outcome factors | VAP incidence rate (‰) | 1267 | 2.38 | 5.03 | 10.25 | 0.00–344.44 |
|  | VAP mortality (%) | 1267 | 0.32 | 11.11 | 26.00 | 0–100 |