Table 2.

Past-year drug use related problems among nonmedical users of prescription stimulants and other drug users

DAST-10 items^a	Past-year nonmedical users of prescription stimulants (n = 212)	Past-year other drug users (n = 1164)^b	Differences between NMUPS and other drug users

	Unadjusted (%)	Unadjusted (%)	Adjusted OR (95% CI)^c
Have you used drugs other than those required for medical reasons?	92.5	69.7	6.71 (3.67–12.27)^***
Have you used more than one drug at a time?	53.8	16.9	5.42 (3.82–7.69)^***
Are you always able to stop using drugs when you want to?^d	14.2	14.4	0.85 (0.55–1.33)
Have you had blackouts or flashbacks as a result of drug use?	21.7	8.3	2.34 (1.54–3.56)^***
Have you ever felt bad or guilty about your drug use?	47.6	29.2	2.10 (1.53–2.88)^***
Have family members ever complained about your involvement with drugs?	20.3	6.0	3.02 (1.93–4.73)^***
Have you stayed away from your family because of your use of drugs?	15.1	5.1	2.34 (1.43–3.83)^**
Have you engaged in illegal activities in order to obtain drugs?	27.4	9.3	2.82 (1.90–4.18)^***
Have you ever experienced withdrawal symptoms (felt sick) when you stopped taking drugs?	14.6	2.5	5.57 (3.13–9.92)^***
Have you had medical problems as a result of your drug use (e.g., memory loss, hepatitis, convulsions, bleeding)?	7.5	2.2	2.83 (1.43–5.61)^**
At least three DAST-10 items	55.2	19.4	4.61 (3.28–6.48)^***
Mean DAST-10 score	Mean = 3.15 (S.D. = 2.05)	Mean = 1.64 (S.D. = 1.43)

^**

p < 0.01,

^***

p < 0.001.

DAST-10 = Drug Abuse Screening Test.

Other drug use refers to nonmedical use of marijuana, cocaine, LSD, other psychedelics, crystal methamphetamine, heroin, inhalants, ecstasy, sleeping medication, sedative/anxiety medication and/or pain medication.

Logistic regression analysis used “past-year other drug users” as the reference group and adjusted for gender, race, class year, family income, living arrangement, fraternity/sorority membership, age at onset of cigarette smoking, alcohol use, and marijuana use.

Prevalence indicates percentage of respondents who indicated a “no” response.