Table 5

Multivariate analysis of involvement in traffic crashes and driving under the influence of alcohol, illicit or medicinal drugs, including combinations of drugs

VariablesBSig.Exp (B)95% CI for Exp (B)
LowerUpper
Gender−0.8330.0000.40.30.7
Age−0.0360.0001.0*1.0*1.0*
Alcohol6.9190.0001011.1466.22192.8
Amphetamine/methamphetamine†5.1440.000171.329.7990.1
Clonazepam3.7270.00241.53.7464.4
Tetrahydrocannabinol2.7270.00015.36.039.0
Zopiclone2.3560.00210.62.545.3
Benzodiazepines and similar substances‡3.0430.00021.09.944.4
Amphetamine+methamphetamine combined with THC−2.9090.009
Amphetamine+methamphetamine combined with benzodiazepines and similar substances−3.4860.001
Clonazepam combined with other benzodiazepines and similar substances−3.6020.023
  • *Numbers are rounded off from Exp (B)=0.965% and 95% CI for Exp (B): 0954–0976.

  • †Samples positive for amphetamine and/or methamphetamine.

  • ‡Benzodiazepines and similar substances: alprazolam, diazepam, etizolam, flunitrazepam, meprobamate, nitrazepam, nordiazepam, oxazepam, phenazepam, phenobarbital and zolpidem.