Among men who were past year non-daily users of cannabis, the perceived great risk of regular cannabis use varied significantly between 2002–2012 χ2(10, N = 49,606) = 10.01, p<0.001, and also decreased significantly when comparing 2002 to 2012 (8.7% vs. 3.9%, respectively) χ2(1, N = 9,168) = 27.45, p<0.001 (Supplemental Table 3a5). The prevalence of perceived great risk of regular use varied significantly between 2002–2012 among White men overall χ2(10, N = 32,441) = 7.40, p<0.001 and Black men overall χ2(10, N = 6,508) = 3.97, p=0.001. There was notable variation in terms of significant change among the different race/ethnicity-age subgroups.
