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AimsTo determine whether childhood physical abuse (CPA) histories were associated with age of onset of psychoactive substance use and injecting, and the extent of polydrug use among injecting drug users (IDU).
DesignCross‐sectional.
SettingSydney, Australia.
Participants and measurementsA total of 300 IDU were administered a structured interview examining the prevalence and severity of CPA and...
Introduction and Aims.To determine age‐related patterns of drug use initiation, drug sequencing and treatment entry among regular psychostimulant users.Design and Methods.Cross‐sectional study of 269 regular psychostimulant users, administered a structured interview examining onset of use for major licit and illicit drugs.Results.The mean age at first intoxication was not associated with age or gender. In contrast, younger age was associated with earlier ages of onset for all of the illicit drug classes. Each additional year of age was associated with a 4 month increase in onset age for methamphetamine, and 3 months for heroin. By the age of 17, those born prior to 1961 had, on average, used only tobacco and alcohol, whereas those born between 1986 and 1990 had used nine different drug classes. The period between initial use and the transition to regular use, however, was stable. Age was also negatively correlated with both age at initial injection and regular injecting. Onset sequences, however, remained stable. Consistent with the age‐related patterns of drug use, each additional year of age associated with a 0.47 year increase in the age at first treatment....
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