Trends in cannabis use suggest that twice as many males as females use the drug. This gender ratio is mirrored in rates of psychosis with males outnumbering females by 2:1. However, researchers at the University of York found there is a significant widening of this ratio for cannabis psychosis, where males outnumber females by four to one.
Links
[1] http://www.universityherald.com/articles/21523/20150727/marijuana-triggers-psychotic-symptoms-in-male-users.htm
[2] http://www.rethinkpot.org/tags/males
[3] http://www.rethinkpot.org/tags/psychosis