]. We also report higher levels of vaping among those with MHCs and or moderate-serious psychological distress. Unlike smoking, there were few associations between vaping characteristics and MHCs; however, there were some associations between psychological distress and disposable e-cigarette use and higher nicotine concentrations.
Current vaping was most prevalent among those with a history of substance misuse disorder, or a severe MHC such as personality disorder, or psychosis. However, many of these people who were vaping were also smoking, with exclusive vaping being quite low among these groups. Vaping characteristics also seemed to differ among clusters of MHCs. Those with a severe MHC had fewer vaping sessions per day, but used high nicotine concentrations.