Table 7.
Creation of the weighted integer score for each parameter of the PIRO score
| Sig. variable | Sub-group | β-coefficient | Score value | Integer score |
|---|---|---|---|---|
| Predisposition (P)-group | ||||
| Age (yrs) | >70 | 1.604 | 1.52 | 2 |
| COPD* | 2.335 | 2.27 | 2 | |
| CLD† | 1.750 | 1.66 | 2 | |
| Cancer | 3.042 | 2.89 | 3 | |
| Presence of foley’s catheter | 1.820 | 1.72 | 2 | |
| Total | 10.551 | 11 | ||
| Infection (I)-group | ||||
| Pneumonia | 0.894 | 0.97 | 1 | |
| CNS | Meningitis/Encephalitis | 2.089 | 2.29 | 2 |
| Abdomen | UTI‡ | 1.571 | 1.71 | 2 |
| Total | 4.554 | 5 | ||
| Response (R)-group | ||||
| Band (%) | >5 | 0.915 | 2.05 | 2 |
| Respiratory rate (/min) | >20 | 1.315 | 2.95 | 3 |
| Total | 2.230 | 5 | ||
| Organ dysfunction (O)-group | ||||
| SBP§ (mmHg) | <90 | 0.761 | 1.28 | 1 |
| PaO2/FiO||2 | <300 | 0.924 | 1.55 | 2 |
| Urine output first in first 2 hours (mL) | <30 ml | 1.042 | 1.75 | 2 |
| APTT¶ (second) | >35 | 0.785 | 1.32 | 1 |
| Creatinine (mg/dl) | >1.8 | 0.801 | 1.34 | 1 |
| GCS** | ≤9 | 1.643 | 2.76 | 3 |
| Total | 5.956 | 10 |
*COPD= Chronic obstructive pulmonary disease; †CLD = Chronic liver disease; ‡UTI = Urinary tract infection; §SBP = Systolic blood pressure; ||PaO2/FiO2 = Partial pressure of oxygen in arterial blood/Fraction of inspired oxygen; APTT = Activated partial thromboplastin time; **GCS = Glasgow coma scale