Among those with 12-month cannabis use disorder, the mean number of days cannabis was used in the prior 12 months was 225.3 (SE=5.69); among those with mild, moderate and severe 12-month disorder, the mean days used was 206.5 (SE=7.79), 243.5 (SE=10.60), and 252.2 (SE=14.03). Among those with lifetime cannabis use disorder, the mean number of days cannabis was used per year during the period of heaviest use was 274.2 (SE=3.76); among those with mild, moderate and severe lifetime disorder, mean days used was 243.7 (SE=5.98), 284.2 (SE=6.36), and 310.4 (SE=4.48), respectively.
