- The proportion of primary heroin admissions who injected the drug declined from 69 percent in 1995 to 63 percent in 2005, while the proportion of primary heroin admissions who inhaled the drug increased from 27 percent in 1995 to 33 percent in 2005
- The proportion of admissions for which medication-assisted opioid therapy was planned fell from 55 percent of primary heroin injection admissions in 1995 to 31 percent in 2005, but remained stable at around 30 percent of primary heroin inhalation admissions
- From 1995 to 2005, the proportion of primary heroin admissions—whether inhalation or injection admissions—receiving ambulatory treatment decreased, while the proportions admitted to residential/rehabilitation treatment or detoxification increased