Table 4.

Characteristics associated with polydrug use in study participants who use drugs (N = 265).

Variablea	OR	95% CI	p
Age in years	0.97	0.94–0.99	0.030
Highest finished education level	1.36	0.99–1.89	0.062
Country of birth (Ref: Austria)
EU member state	2.87	0.59–13.78	0.189
Non-Eu member state	0.28	0.06–1.28	0.101
Non European	0.16	0.11–2.37	0.181
Drug use at private parties (Ref: No)
Yes	1.96	0.89–1.89	0.093
Drug use during clubbing (Ref: No)
Yes	6.24	1.32–29.52	0.021
Drug use during sex (Ref: No)
Yes	2.11	1.09–4.05	0.026
ART Adherence (Ref: Adherent)
Non adherent	8.09	2.19–29.87	0.002

^aVariables with the cut-off point of p < 0.2 in the univariate analysis were included in the model. During stepwise backwards elimination only those with the significance level of p < 0.05 were retained in the final model. Variables included in the first step were: age, sex, current relationship, time passed since HIV diagnosis, duration of HAART, country of birth, highest finished education level, current CD4+ count known, drug use at home, drug use at private parties, drug use while clubbing, drug use during sex, condomless sex, preforming sexual acts not doing sober, awareness of potential interactions between drugs and HAART, drug non-adherence.