Your browser version may not work well with NCBI's Web applications. More information here...
1: Lancet. 1987 Dec 26;2(8574):1483-6.Click here to read Links

Cannabis and schizophrenia. A longitudinal study of Swedish conscripts.

Andréasson S, Allebeck P, Engström A, Rydberg U.

Karolinska Institutet, Department of Social Medicine, Huddinge, Sweden.

The association between level of cannabis consumption and development of schizophrenia during a 15-year follow-up was studied in a cohort of 45,570 Swedish conscripts. The relative risk for schizophrenia among high consumers of cannabis (use on more than fifty occasions) was 6.0 (95% confidence interval 4.0-8.9) compared with non-users. Persistence of the association after allowance for other psychiatric illness and social background indicated that cannabis is an independent risk factor for schizophrenia.

PMID: 2892048 [PubMed - indexed for MEDLINE]