Table 3

Prevalence of substances in blood samples (cases) and oral fluid samples (controls)

SubstanceCases
(n=612) (%)
Controls
(n=3027) (%)
Any substance81.71.6
Alcohol (ethanol) ≥0.02 g/dL67.00.2
Illicit drugs15.20.6
THC9.80.4
Amphetamine and/or methamphetamine8.50.2
Amphetamine 5.90.1
Methamphetamine 5.10.1
Cocaine or benzoylecgonine0.20.1
Benzoylecgonine 0.1
Cocaine 0.20
Medicinal drugs18.00.9
Diazepam or nordiazepam8.20.3
Diazepam 7.70.2
Nordiazepam 5.40.1
Clonazepam or 7-aminoclonazepam4.20.1
7-aminoclonazepam 0.70
Clonazepam 4.20.1
Alprazolam3.80.1
Zopiclone2.30.2
Oxazepam2.30
Morphine2.10
Flunitrazepam1.60
Buprenorphine1.30
Meprobamate1.30
Codeine1.00
Zolpidem0.50.1
Methadone0.20
Nitrazepam0.20
Phenazepam0.20.1
Phenobarbital00.1
  • THC, tetrahydrocannabinol.