Substance LC-MS/MS Cutoff (ng) Metabolite LC-MS/MS Cutoff (ng) Positive Substance Count Number of Times Observed For Each Substance Number of Times Not Observed For Each Observed Median Substance Concentration When Observed Median Substance Concentration When Not Observed Percent Matching
Methamphetamine 100 Amphetamine 100 62 55 7 6,589 701 89
Methadone 50 EDDP 50 803 781 22 2,269 355 97
Buprenorphine 10 Norbuprenorphine 20 108 105 3 65 131 97
Fentanyl 2 Norfentanyl 8 711 698 13 44 10 98
Carisoprodol 50 Meprobamate 50 598 588 10 457 174 98
Hydrocodone 50 Hydromorphone 50 3,005 2,076 929 1,540 341 69
Oxycodone 50 Oxymorphone 50 2,129 1,972 157 2,139 450 93
Table 7a: Observations on the occurrence of parent medication and metabolite (concentration in ng/mL).
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