Observed prevalence rates for marijuana use and panic psychopathology were first computed. In terms of lifetime prevalence, the observed base rates were 42.5% (2,411/5,672), 28.3% (1,609/5,692), and 6.1% (347/5,692) for marijuana use, panic attacks, and panic disorder, respectively. The prevalence rates for 12-month marijuana use, panic attacks, and panic disorder were 9.5% (538/5,670), 11.2% (639/5,692), and 3.7% (208/5,692), respectively.
