NCJ Number
231478
Journal
Drug and Alcohol Review Volume: 29 Issue: 4 Dated: July 2010 Pages: 358-363
Date Published
July 2010
Length
6 pages
Annotation
This study examined whether recreational methamphetamine users were at elevated risk of psychotic symptoms compared with a group of recreational drug users who did not use methamphetamine.
Abstract
To determine whether recreational methamphetamine use is associated with an increased risk of psychotic symptoms, a cross-sectional survey of 157 people attending dance events in Sydney, Australia. Participants were assessed for psychotic symptoms in the past year using items from the Psychosis Screen. Participants with and without psychotic symptoms were compared on methamphetamine use, polydrug use and other demographic factors. An ordinal logistic regression was used to determine the probability of psychotic symptoms by methamphetamine use and level of polydrug use. Psychotic symptoms in the past year were predicted by methamphetamine use and heavier polydrug use in the past year, and a history of a psychotic disorder (schizophrenia, schizoaffective or bipolar affective disorder). After removing participants with a history of a psychotic disorder (n = 16) and adjusting for polydrug use, methamphetamine use increased the probability of two or more psychotic symptoms (indicative of psychosis risk) from 9 percent to 21 percent. There was a non-significant increase in the risk of psychotic symptoms with higher levels of polydrug use. Methamphetamine use was typically monthly or less often (83 percent), and most users described their use as recreational (85 percent). Within the context of polydrug use, recreational methamphetamine use is associated with a twofold to threefold increase in the probability of psychotic symptoms. Tables, figure, and references (Published Abstract)