Because of the low number of cocaine-positive samples in this population, the higher frequency of combined cocaine and ethanol positive cases compared to ethanol and cannabis or amphetamine did not reach statistical significance ( P = 0.13 and 0.07, respectively).
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Urine Drug Tests Indicate Higher Prevalence of Combined Alcohol and Cocaine Use Compared to Alcohol Together with Cannabis or Amphetamine-A Possible Link to Cocaethylene.
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0.1300