Fentanyl Concentrations (ng/mL)
  CB PB C/P Ratio
N 179 179 179
Min 1.8 1.7 0.03
Max 176 373 15.19
Mean 20.61 20.46 1.55
Median 13 11 1.09
  Standard Deviation 1.78
Table 1: Summary of 179 fentanyl positive cases from the Los Angeles County Department of Coroner.