Table 2.
Cannabis use characteristic | % or median (range) |
---|---|
Time since last use at interview (years) | 1.3 (1 day–37) |
Age at 1st use (years) | 14 (8–23) |
Age at 1st regulara use (years) | 16 (8–48) |
Age at index quit attempt (years) | 29.3 (15.4–59.1) |
Interval between index quit attempt & interview (years) | 9 (1 day–37) |
Number of lifetime quit attempts | 4 (1–100) |
Cannabis preparation ever used | |
Marijuana | 97.5% |
Blunts | 75.8% |
Hashish | 71.7% |
Hashish oil | 21.7% |
Other | 2.5% |
Cannabis preparation used at time of quit attempt | |
Marijuana | 67.5% |
Blunt | 30.9% |
Hashish | 0.8% |
Hashish oil | 0.8% |
Frequency of use during 6 months prior to index quit attempt | |
More than once a day | 43.3% |
Once a day | 9.2% |
Four to six days a week | 20.0% |
Two to three days a week | 20.0% |
Once a week | 7.5% |
Days of use in month before index quit attempt | 30 (4–31) |
Number of “joints” smoked per day in month prior to index quit attempt | 4 (1–80) |
Number of “joints” smoked the month prior to index quit attempt | 93 (4–2480) |
Used cannabis before onset of schizophrenia (n = 107) | 29.0% |
Regulara use of cannabis before onset of schizophrenia (n = 107) | 20.6% |
Regular = at least weekly use.