Table 5: Prevalence of alcohol and other drug use among the sub-sample : Urinalysis.

Response*%SE95% CI

Lost samples12.21.39.6–14.7
Positive for drugsYes**18.91.615.8–22.1
No68.91.965.3–72.6
Met standardized drug cut-offYes8.81.16.7–10.9
No79.11.675.9–82.2
Positive for alcoholYes***19.91.716.6–23.1
No67.61.964.0–71.2
Met standardized alcohol cut-offYes19.61.716.3–22.8
No67.91.864.3–71.5
Positive for either drugs or alcoholYes33.52.029.7–37.4
No54.32.050.4–58.2
Met standardized cut-off for drugs or alcoholYes25.81.822.2–29.4
No62.01.958.2–65.9
Polydrug use****No drugs68.91.965.3–72.6
1 drug15.81.512.9–18.8
>1 drug3.10.61.9–4.3

34 women have no urine data and 61 have no alcohol and methamphetamine data due to the specimens having been inadvertently destroyed; **70 of these women were not classified as positive according to standardized cut-off levels; ***2 of these women were not classified as positive according to standardized cut-off levels; ****refers to the use of more than one illicit drug and excludes alcohol.