Key Findings:  In a 14-year Dutch follow-up study assessing 1580 individuals from childhood through adolescence, it was found that the link between cannabis use and subsequent psychotic symptoms occurred independently of earlier detected psychopathology, suggesting that cannabis use is a specific risk factor for developing psychotic symptoms, and preventive measures targeting cannabis use could potentially reduce the incidence of psychosis in vulnerable populations.
Type of Study:  Clinical Trial
Study Sample Size:  1580
Study Result:  Negative
Research Location(s):  Netherlands
Year of Pub:  2005
Cannabinoids Studied:  Tetrahydrocannabinol (THC)
Phytocannabinoid Source:  Cannabis Flower derived
Chemotype:  Chemotype I
Citation:  Ferdinand RF, et al. Cannabis--psychosis pathway independent of other types of psychopathology. Schizophr Res. 2005; 79:289-95. doi: 10.1016/j.schres.2005.07.027
Authors:  Ferdinand RF, van der Ende J, Bongers I, Selten JP, Huizink A, Verhulst FC