Table 4.
Comparing cannabis only use groups to concurrent co-use, sequential co-use, and co-administrator use groups
| Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | |||
|---|---|---|---|---|---|---|---|
| Cannabis | Concurrent | Co-admin. | Sequential | Sequential + | Overall | Group | |
| use only | use only | only | use only | co-admin. | ANCOVA | differences a | |
| Mean (SE) | Mean (SE) | Mean (SE) | Mean (SE) | Mean (SE) | F (df=8) | -- | |
| Frequency of marijuana use |
8.55 (0.40) | 9.94 (0.38) | 15.05 (0.67) | 12.60 (0.57) | 17.30 (0.51) | 32.82‡ | 1/3, 2/3, 1/4, 2/4, 3/4, 1/5, 2/5, 4/5 |
| Quantity of marijuana use |
0.58 (0.05) | 0.53 (0.05) | 0.90 (0.08) | 0.94 (0.07) | 1.04 (0.06) | 17.67‡ | 1/3, 2/3, 1/4, 2/4, 1/5, 2/5 |
| CUD b | 1.02 (0.19) | 1.21 (0.17) | 1.83 (0.26) | 1.54 (0.22) | 2.81 (0.18) | 12.15‡ | 1/5, 2/5, 3/5, 4/5 |
| Marijuana consequences |
13.11 (0.46) | 14.12 (0.44) | 18.30 (0.77) | 16.64 (0.65) | 22.29 (0.59) | 28.32‡ | 1/3, 2/3, 1/4, 2/4 1/5, 2/5, 3/5, 4/5 |
| Marijuana selling |
0.04 (0.02) | 0.05 (0.02) | 0.15 (0.03) | 0.16 (0.02) | 0.23 (0.02) | 14.76‡ | 1/3, 2/3, 1/4, 2/4 1/5, 2/5 |
| Marijuana- impaired driving |
0.15 (0.02) | 0.21 (0.02) | 0.47 (0.04) | 0. 38 (0.03) | 0.55 (0.03) | 21.62‡ | 1/3, 2/3, 1/4, 2/4, 1/5, 2/5, 4/5 |
| Delinquency | 6.41 (0.15) | 6.56 (0.14) | 6.67 (0.25) | 7.13 (0.21) | 8.53 (0.19) | 15.68‡ | 1/4, 1/5, 2/5, 3/5, 4/5 |
| Physical ailments |
2.09 (0.07) | 1.92 (0.07) | 2.21 (0.12) | 2.13 (0.11) | 2.40 (0.10) | 6.94‡ | 2/5 |
| Physical health | 12.21 (0.13) | 12.43 (0.12) | 12.29 (0.21) | 11.68 (0.18) | 11.76 (0.16) | 6.34‡ | 2/4, 2/5 |
| Social functioning |
42.66 (0.41) | 43.18 (0.39) | 43.99 (0.69) | 42.41 (0.58) | 43.17 (0.52) | 3.97‡ | -- |
| Anxiety | 5.73 (0.29) | 4.74 (0.28) | 5.31 (0.50) | 5.88 (0.42) | 6.67 (0.38) | 4.44‡ | 2/5 |
| Depression | 5.71 (0.31) | 5.42 (0.29) | 5.83 (0.51) | 6.90 (0.43) | 7.57 (0.39) | 5.79‡ | 1/5, 2/4, 2/5 |
| N | 344 | 374 | 122 | 170 | 212 | ||
Note.
a
Group differences significant at p < .05 from pairwise comparisons.
b
past month marijuana use only (n=738). Adjusted means and SEs after controlling for age, gender, race/ethnicity, and college status are shown.
‡
p < .001.
CUD = cannabis use disorder.