Co-occurring serious mental illnesses and substance use disorders as predictors of assaultive infraction charges among adult male jail inmates

This study used self-report data from 4642 adult male jail inmates to test the hypothesis that inmates with co-occurring serious mental illnesses (SMIs) and substance use disorders (SUDs) (i.e. co-occurring disorders) would report having been officially charged for assaulting staff or inmates more often than inmates without co-occurring disorders. Negative binomial regression indicated that relative to inmates with neither SMI nor SUDs, assault charges were most likely to be reported by inmates with co-occurring SMI and substance abuse, co-occurring SMI and substance dependence, and only substance abuse, respectively (ps.01). Having been charged with assault was also strongly associated with assault victimization before and while incarcerated (ps.05). This article concludes with recommendations for jail policies and future research.