Table 1.

Background.

	N (%)
Age
Age 18–24	305 (56%)
Age 25–34	196 (36%)
Age 35 and over	39 (7%)
Gender
Male	501 (93%)
Female	39 (7%)
Education
Primary School (initiated or completed)	72 (13%)
Secondary School (initiated or completed)	406 (75%)
University (initiated or completed)	62 (11%)
Socioeconomic status (SES)
Low SES	412 (77%)
Middle SES	114 (21%)
Upper SES	11 (2%)
Drug use prior to injection initiation (30 days prior to first injection)
Heroin	369 (68%)
Cocaine	271 (50%)
Marijuana	472 (87%)
Alcohol	314 (58%)
Heroin mixed with cocaine	143 (26%)
Heroin mixed with other drugs	190 (35%)

Note. Percentage may not add up to 100% due to rounding. Not all participants responded to all items.