PESI and sPESI scores classification, associated 30-day mortality and risk of death
| Class | Stratification | 30-day mortality risk | |
| PESI score | |||
| <65 points | Class I | Very low mortality risk | 1.1% |
| 66–85 points | Class II | Low mortality risk | 3.1% |
| 86–105 points | Class III | Moderate mortality risk | 6.5% |
| 106–125 points | Class IV | High mortality risk | 10.4% |
| >125 points | Class V | Very high mortality risk | 24.5% |
| sPESI score | |||
| 0 points | N/A | Low risk | 1.1% |
| ≥1 points | N/A | High risk | 8.9% |
Information from [15, 16].