The findings on MA-induced psychosis suggest a lack of gender differences. In the study by Chen et al. previously described, 74% of the 174 subjects in a group with MA-induced psychosis were men (Chen et al., 2003). However, after controlling for study site differences the authors found no significant difference in gender ratios between groups of MA users with and without a lifetime history of MA-induced psychosis. Other studies have also failed to detect gender differences in MA-induced psychosis (Brecht et al., 2004; Lin et al., 2004).
