Table 4

Laboratory risk indicator for NF: A score of =5 points indicates a low risk (< 50% probability) of NF; 6–7 points indicate an intermediate risk (50%–75% probability) of NF; 8 points or more indicate a high risk (> 75% probability) of NF.

INVESTIGATIONSCORE
Serum C-reactive protein = 150 mg/L4 points
White blood cell count
 •15 000/μL-25 000/μL1 point
 •> 25 000/μL2 points
Hemoglobin
 •11.0–13.5 g/dL1 point
 •< 11 g/dL2 points
Serum sodium < 135 mEq/L2 points
Serum creatinine > 1.6 mg/dL (141 mmol/L)2 points
Serum glucose > 180 mg/dL (10 mmol/L)1 point
  • NF—necrotizing fasciitis.

  • Data from Anaya and Dellinger9 and Wong et al.32