Table 2.
Cannabis use characteristics of 120 participants with schizophrenia and chronic cannabis use.
| 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% |
a
Regular = at least weekly use.