The prevalence of perceived great risk of regular cannabis use varied significantly between 2002–2012 χ2(10, N = 231,909) = 38.41, p<0.001 among men overall, and the prevalence decreased significantly when comparing 2002 and 2012 (49.0% vs. 39.1%, respectively) χ2(1, N = 40,694) = 124.51, p<0.001 (Supplemental Table 2a3). The prevalence of perceived great risk of regular use varied between 2002–2012 among most race/ethnicity and age subgroups, with several exceptions: Black men age 50+ χ2(10, N = 2,154) = 0.98, p=0.447, Hispanic men age 50+ χ2(10, N = 1,837) = 2.53, p=0.009, and men of Other race/ethnicity ages 12–17 χ2(10, N = 7,452) = 2.89, p=0.003, ages 26–49 χ2(10, N = 4,638) = 1.85, p=0.058, and age 50+ χ2(10, N = 1,406) = 1.70, p=0.094, among whom perceived great risk of regular cannabis use did not vary significantly.
