Table 3.
FGSI Score and Performance
| Temperature (°C) | Score | Serum Sodium (mmol/L) | Score | Serum Potassium (mmol/L) | Score |
|---|---|---|---|---|---|
| > 41 | 4 | <110 or >180 | 4 | <2.5 or >7 | 4 |
| 30–31.9 or 39–40.9 | 3 | 111–119 or 160–179 | 3 | 6–6.9 | 3 |
| 32–33.9 | 2 | 120–129 or 155–159 | 2 | 2.5–2.9 | 2 |
| 34–35.9 or 38.5–38.9 | 1 | 150–154 | 1 | 3–3.4 or 5.5–5.9 | 1 |
| 36–38.4 | 0 | 130–149 | 0 | 3.5–5.4 | 0 |
| Heart Rate (beats/min) | Score | Hematocrit (%) | Score | Serum WBC (total/mm3 x1000) | Score |
| <39 or >180 | 4 | <20 or >60 | 4 | <1 or >40 | 4 |
| 40–54 or 140–179 | 3 | 20–29.9 or 50–59.9 | 2 | 1–2.9 or 20–39.9 | 2 |
| 55–69 or 110–139 | 2 | 46–49.9 | 1 | 15–19.9 | 1 |
| 70–109 | 0 | 30–45.9 | 0 | 3–14.9 | 0 |
| Bicarbonate (mmol/L) | Score | Respiratory Rate (breaths/min) | Score | Test Characteristics | |
| <15 or >52 | 4 | <5 or >50 | 4 | FGSI Score | >9 |
| 15–17.9 or 41–51.9 | 3 | 35–49 | 3 | Sensitivity | 67% |
| 18–21.9 | 2 | 6–9 | 2 | Specificity | 96% |
| 32–40.9 | 1 | 10–11 or 25–34 | 1 | Positive LR | 16 |
| 22–31.9 | 0 | 12–24 | 0 | Negative LR | 0.4 |
Note: Adapted by permission from Springer Nature, Int Urol Nephrol. Kabay S, Yucel M, Yaylak F, et al. The clinical features of Fournier’s gangrene and the predictivity of the Fournier’s gangrene severity index on the outcomes. 40(4):997–1004, copyright (2008).72
Abbreviations: WBC, white blood cell; LR, likelihood ratio.