Table 2.

Logistic regression analysis: Predictors of illicit use of pharmaceutical opioids in past 30 days.

Variable	Odds ratio	95% CI	p value
Age	0.95	0.85 – 1.07	0.402
Male (vs. female )	1.34	0.77 – 2.33	0.299
Ethnicity (vs. White)
African American	0.31	0.10 – 1.01	0.052
Other ethnicity	1.33	0.52 – 3.41	0.549
School enrollment (vs. not in school)	0.75	0.41 – 1.37	0.345
Treatment history (vs. never in treatment)	0.83	0.43 – 1.63	0.591
Depressive symptoms (BDI scores ‘≥20’ vs. ‘<20’)	2.15	1.04 – 4.44	0.039
Marijuana use past 30 days (vs. 0 days)
> 20 days	2.07	0.84 – 5.12	0.114
1–20 days	1.54	0.60 – 3.95	0.365
Drunk past 30 days (vs. 0 days)
10 or more days	1.32	0.55 – 3.12	0.535
1–9 days	0.89	0.40 – 1.97	0.766
Other drug use past 30 days (vs. no use)
Heroin	2.22	0.53 – 9.24	0.275
Cocaine	1.48	0.80 – 2.70	0.210
Methamphetamine	0.71	0.29 – 1.71	0.440
Ketamine	0.75	0.34 – 1.66	0.472
Prescription tranquilizers	6.43	3.36 – 12.31	<0.001
Prescription stimulants	2.90	1.33 – 6.32	0.007
LSD and psilocybin	2.02	1.03 – 3.94	0.040
Inhalants	2.26	1.01 - 5.06	0.048
Lifetime MDMA use (vs. 1–10 occasions)
> 50 occasions	0.77	0.33 – 1.82	0.551
21–50 occasions	1.95	0.96 – 3.97	0.065
11–20 occasions	1.20	0.59 – 2.43	0.617

Hosmer-Lemeshow Test: X² =5.42, df=8, p=0.712