Rob V. Bijl

TL;DR: Community epidemiological surveys using the World Health Organization Composite International Diagnostic Interview administered face‐to‐face were carried out in 10 countries in North America, Latin America, Europe, and Asia.

TL;DR: Results confirm previous suggestions that cannabis use increases the risk of both the incidence of psychosis in psychosis-free persons and a poor prognosis for those with an established vulnerability to psychotic disorder.

TL;DR: Ass associations with lower age, single marital status, urban dwelling, lower level of education, lower quality of life, depressive symptoms and blunting of affect did not differ qualitatively as a function of type of rating of the psychotic symptom, were similar in individuals with and without any CIDI lifetime diagnosis, and closely resembled those previously reported for schizophrenia.

TL;DR: In this paper, the authors report the results of a cross-national investigation of patterns of comorbidity between substance use and psychiatric disorders in six studies participating in the International Consortium in Psychiatric Epidemiology.

TL;DR: Comparing the QL of a wide range of chronic disease patients found that patients who were older, female, had a low level of education, were not living with a partner, and had at least one comorbid condition, in general, reported the poorest level of QL.