Research involving drug users and treatment evaluations continue to rely extensively on self-
reports of drug use. This paper presents a meta-analytical review of 24 studies published …

One hundred and fifty felony drug offenders diverted from prison to community-based,
residential drug treatment alternative to prison program completed a comprehensive …

Objective: We sought to examine the relation between cannabis abuse and the symptomatic
course of recent-onset schizophrenia and related disorders. Design: A prospective cohort …

Background: Cannabis is the most widely used illegal drug worldwide. Long-term use of
cannabis is known to cause chronic bronchitis and airflow obstruction, but the prevalence of …

The effects of cannabis on lung function remain unclear and may be different from those of
tobacco. We compared the associations between use of these substances and lung function …

Purpose.–To test the hypothesis that recent onset psychotic patients who use cannabis will
have psychotic symptoms that are more severe and more persistent than those who do not …

Cannabis consuming schizophrenic patients are younger at onset, are likely to have started
abuse before onset of schizophrenia and show more prominent positive symptoms than …

A study was carried out on a group of 95 schizophrenic patients (DSM‐III‐R criteria) under
the age of 35, 23 of whom were cannabis abusers in the past year. The objective of the study …

An earlier age of onset of schizophrenia has been identified as a poor prognostic indicator.
The current study examines the interaction effect of gender and cannabis use on age of …

Cannabis is the most commonly used illicit drug. Prevalence rates are particularly high
among adolescents. Neuropsychological studies have identified cannabis-associated …