Prevalence of Injection Drug Use Among Young Adults Aged 21-30 in the US
" In the nine-year (2004–2012) combined sample of young adults aged 21–30, 1.6% report having ever used any drug by injection without medical supervision (Table 1a). There is a fair-sized gender difference—2.4% of males and 0.9% of females indicate such behavior. The percentage saying they injected on 40 or more occasions is 0.5% overall—0.6% for males and 0.4% for females. Therefore, a relatively limited segment of respondents has ever used an illicit drug by injection—about 1 in every 60; a smaller proportion. About 1 in every 200 respondents reports an extended pattern of use as indicated by use on 40 or more occasions.
" The proportions of young adults who have injected drugs during the past 12 months without medical supervision is considerably smaller: 0.5% overall—1 in every 200 respondents—including 0.8% of males and 0.3% of females (a highly significant gender difference). The proportions using 40 or more times in the past 12 months are 0.2% overall—0.2% for males, and 0.1% for females. It is interesting to note that the proportional difference between the genders is larger for having injected drugs in their lifetime (2.4% of males versus 0.9% of females) than it is for having ever shared needles (0.5% of males versus 0.4% of females), suggesting that females injectors are more at risk of needle sharing."
Johnston, L. D., O’Malley, P. M., Bachman, J. G., Schulenberg, J. E., Patrick, M. E.. & Miech, R. A. (2013). HIV/AIDS: Risk & Protective Behaviors among American Young Adults, 2004–2012. Ann Arbor: Institute for Social Research, The University of Michigan, p. 18.