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).