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Table 3 Alcohol and/or drugs identified in cases via laboratory testing at time of admittance

From: Medication use and the risk of motor vehicle collision in West Virginia drivers 65 years of age and older: a case-crossover study

Substance Cases tested N (%) Cases testing positive N (%) Cases testing positive who had prescriptions for the identified drug N (%)
Alcohol 269 (44.0) 12 (4.5)
Drugs 194 (31.8) 61 (31.4)
Benzodiazepines 194 (31.8) 33 (17.0) 16 (48.5)
Opiates 194 (31.8) 30 (15.5) 15 (50.0)
  1. Patients could be tested for the following drugs: amphetamines, barbiturates, benzodiazepines, buprenorphine, cannabis, cocaine, opiates, phencyclidine and propoxyphene. Benzodiazepines and opiates were the only drugs detected among patients tested