Table 4

 Reports of alcohol and drug use by interview mode, Druid Project

BehaviourInterview modeAdusted OR†95% CI
ACASI (%)IAQ (%)
†Adjusted odds ratios for mode effect derived from logistic regression model controlling for sex, age, marital status, education, patient status, and health insurance coverage. * p<0.05, **p<0.01, ***p<0.001.
‡Questions included the different forms of cocaine such as powder, “crack”, free base, and coca paste.
§Respondent was asked whether they ever injected heroin, speed, cocaine or steroids.
¶Drank five or more drinks on the same occasion at least once in past 30 days.
    Never drank alcohol14.77.32.21***1.53 to 3.18
    Never smoked marijuana27.028.30.970.75 to 1.24
    Ever used cocaine‡20.521.70.960.69 to 1.34
    Ever injected drugs§ to 2.46
Recent use
    No alcohol in the past 30 days38.535.91.120.89 to 1.40
    Drank 5+ drinks 1+ days in the past 30 days¶26.421.11.39*1.07 to 1.81
    Smoked marijuana in the past 30 days36.130.51.28*1.0 to 1.64
    Cocaine use in the past 30 days6. to 1.84
    Injected drugs in the past 30 days2.10.92.440.91 to 6.55