Polydrug use and its association with drug treatment outcomes among primary heroin, methamphetamine, and cocaine users.

ABSTRACT:

Background

Polydrug use may challenge effective treatment for substance use disorders. We evaluate whether secondary substance use modifies the association between treatment and primary drug use among primary heroin, cocaine and methamphetamine (MA) users.

Methods

Data were obtained from prospective cohort studies on people who use illicit drugs (PWUD) in California, USA. Using repeated monthly data on self-reported secondary substance use (heroin, cocaine, MA, alcohol or marijuana; ≥1day in a month), primary drug use (≥1day in a month), and treatment participation, collected via timeline follow-back, we fitted generalized linear mixed multiple regression models controlling for potential confounders to examine the interactions between treatment and secondary substance use on

SUBMITTER: Wang L 

PROVIDER: S-EPMC5681890 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature