Table 1.
The different scoring systems that can be used in outcome prediction in FG. The probabilities of death and survival refer to the data published by the original authors relative to their proposed cut-off value.
| Scoring system | Cut-off value | Probability of death | Probability of survival | Advantages | Disadvantages |
|---|---|---|---|---|---|
| Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) | ⩽5 = low risk 6–7 = medium risk ⩾8 = high risk |
– | – | Simple to calculate High positive and negative predictive power |
Not specific to FG Only designed as a diagnostic tool |
| Fournier’s Gangrene Severity Index (FGSI) | 9 | 75% | 78% | Incorporates patient factors Regression analysis specific to FG patients |
Timely to calculate |
| Uludag Fournier’s Gangrene Severity Index (UFGSI) | 9 | 94% | 81% | Original data based on a larger sample size More sensitive than FGSI |
Timely to calculate Less specific than FGSI |
| Simplified Fournier’s Gangrene Severity Index (SFGSI) | 2 | – | – | Only uses three biochemical tests in the calculation | |
| Charlson Comorbidity Index | – | – | – | Simple to calculate Widely validated in other disease processes |
Not specific to FG |
| Surgical Apgar Score | – | – | – | Simple to calculate Widely validated in other disease processes |
Not specific to FG Calculated from intraoperative parameters therefore limited utility in the initial setting |
| Neutrophil-to-lymphocyte ratio (NLR) | – | – | – | A strong predictor of morbidity and mortality in other disease processes | Little research into application in FG patients |
FG, Fournier’s gangrene.