Table 2.
Cannabis use variables for adolescent controls, adolescent users, adult controls and adult users.
| Adolescent control (n = 63) | Adolescent user (n = 76) | Adult control (n = 64) | Adult user (n = 71) | Group differences | |
|---|---|---|---|---|---|
| Ever used cannabis (controls) | |||||
| No | 8 (12.7%) | NA | 2 (3.1%) | NA | |
| Yes | 55 (87.3%) | NA | 62 (96.9%) | NA | Adult controls > adolescent controls* |
| Cannabis, number of lifetime uses (controls) | 3.4 (2.8) [2.0, 0.0–10.0] | NA | 4.5 (3.1) [4.0, 0.0–10.0] | NA | Adult users > adolescent users* |
| Cannabis, time since last use (days) (users) | NA | 2.4 (2.6) [1.6, 0.5–14.0] | NA | 2.5 (4.6) [1.0, 0.5–35.0) | |
| Cannabis, age of first ever use (years) (users) | NA | 14.6 (1.1) [14.7, 11.0–16.6] | NA | 18.0 (2.9) [17.9, 13.0–25.0] | Adult users > adolescent users* |
| Cannabis, use frequency (days/week) (users) | NA | 3.7 (2.0) [3.4, 0.8–6.9] | NA | 4.1 (1.9) [3.8, 0.8–6.9] | |
| CUDIT-R | NA | 15.4 (5.6) [5.0–27.0] | NA | 11.9 (4.8) [3.0–26.0] | Adolescent users > adult users*** |
| Number of users who most commonly use strong herbal cannabis (i.e. ‘skunk’) | NA | 69 (90.8%) | NA | 59 (83.1%) | |
| Cannabis, amount used on a day of use (grams) (users) | NA | 1.1 (0.8) [1.0, 0.1–4.0] | NA | 0.6 (0.7) [0.4, 0.03–3.5, n = 68] | Adolescent users > adult users* |
Group differences are highlighted in the final column. Amount of cannabis used on a day of use has data missing for three adult users. For continuous data mean (SD) [median, minimum–maximum] is shown, for categorical data n (%) is shown.
CUDIT-R: cannabis use disorder identification test revised; NA: not applicable; SD: standard deviation.
*
p < 0.05, **p < 0.01, ***p < 0.001.