Table 3.
Result of logistic regression analysis in the derivation cohort and points assigned to each procedure
| Variable | β | exp(β) | 95 % CI | P value | Points for procedure |
|---|---|---|---|---|---|
| Admission-precipitating diagnosis | |||||
| Acute myocardial infarction | Ref | ||||
| Congestive heart failure | −0.10 | 0.90 | 0.83 – 0.98 | 0.012 | |
| Acute cerebrovascular disease | −0.11 | 0.90 | 0.82 – 0.97 | 0.010 | |
| Gastrointestinal hemorrhage | −0.51 | 0.60 | 0.55 – 0.66 | <0.001 | |
| Pneumonia | 0.04 | 1.04 | 0.95 – 1.13 | 0.405 | |
| Septicemia | 0.73 | 2.07 | 1.87 – 2.28 | <0.001 | |
| Sex (female) | −0.12 | 0.89 | 0.86 – 0.91 | <0.001 | |
| Age | |||||
| <60 | Ref | ||||
| 60–69 | 0.35 | 1.43 | 1.33 – 1.53 | <0.001 | |
| 70–79 | 0.68 | 1.98 | 1.86 – 2.11 | <0.001 | |
| 80–89 | 1.14 | 3.12 | 2.94 – 3.31 | <0.001 | |
| ≥90 | 1.60 | 4.96 | 4.65 – 5.30 | <0.001 | |
| Charlson comorbidity index | |||||
| 0 | Ref | ||||
| 1 | 0.03 | 1.03 | 0.98 – 1.07 | 0.233 | |
| 2 | 0.18 | 1.20 | 1.16 – 1.24 | <0.001 | |
| ≥3 | 0.72 | 2.05 | 1.96 – 2.14 | <0.001 | |
| Procedure | |||||
| Invasive arterial pressure measurement | −0.30 | 0.74 | 0.68 – 0.81 | <0.001 | −3 |
| Blood tests (excluding coagulation) | −0.26 | 0.77 | 0.73 – 0.81 | <0.001 | −3 |
| Radiography | −0.20 | 0.82 | 0.79 – 0.86 | <0.001 | −2 |
| Urinalyses (excluding chemistry) | −0.18 | 0.84 | 0.81 – 0.87 | <0.001 | −2 |
| Temporary urinary catheterization | −0.18 | 0.84 | 0.74 – 0.94 | 0.004 | −1 |
| Endocrinology tests | −0.06 | 0.94 | 0.91 – 0.97 | <0.001 | −1 |
| Bacterial microscopy or culture | −0.05 | 0.95 | 0.91 – 0.99 | 0.019 | −1 |
| Acid-fast bacilli culture | −0.04 | 0.96 | 0.91 – 1.02 | 0.206 | # |
| Coagulation tests | −0.03 | 0.97 | 0.94 – 1.01 | 0.117 | # |
| Nucleic acid amplification tests | 0.01 | 1.01 | 0.93 – 1.09 | 0.842 | # |
| Bacterial drug susceptibility tests | 0.06 | 1.06 | 1.01 – 1.12 | 0.022 | 1 |
| Urine chemistry tests | 0.10 | 1.10 | 1.00 – 1.21 | 0.041 | 1 |
| Heart rate/respiration monitoring | 0.18 | 1.20 | 1.16 – 1.24 | <0.001 | 2 |
| Peripheral intravenous infusion | 0.18 | 1.20 | 1.16 – 1.24 | <0.001 | 2 |
| Computed tomography scan | 0.25 | 1.28 | 1.24 – 1.32 | <0.001 | 3 |
| Pulse oximetry | 0.29 | 1.33 | 1.29 – 1.37 | <0.001 | 3 |
| Gastric drainage tube insertion | 0.32 | 1.38 | 1.27 – 1.50 | <0.001 | 4 |
| Urinary catheter insertion | 0.47 | 1.60 | 1.55 – 1.66 | <0.001 | 5 |
| Central venous catheter insertion | 0.49 | 1.63 | 1.49 – 1.77 | <0.001 | 5 |
| Use of catecholamines or vasopressin | 0.70 | 2.02 | 1.92 – 2.13 | <0.001 | 8 |
| Sputum suction | 1.11 | 3.04 | 2.92 – 3.16 | <0.001 | 12 |
| Intratracheal intubation | 2.05 | 7.77 | 7.14 – 8.45 | <0.001 | 23 |
# No points assigned because of non-significance of the coefficient
CI – confidence interval