Table 2.
Indirect effects of co-use motives on co-use consequences via multiple alcohol and cannabis product usage
| Effect Enhancement Motives | Social Motives | Offered Motives | Coping Motives | |||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Outcome/Mediator | IE | 95% CI | IE | 95% CI | IE | 95% CI | IE | 95% CI |
|
| ||||||||
| Level-1 Effects | ||||||||
|
| ||||||||
| Number of consequences | ||||||||
| # of Alcohol products | 0.02* | [0.007, 0.041] | 0.03* | [0.014, 0.039] | 0.02* | [0.008, 0.029] | 0.01 | [−0.003, 0.023] |
| # of Cannabis products | 0.01 | [−0.001, 0.022] | 0.00 | [0.000, 0.009] | 0.00 | [0.000, 0.010] | 0.01 | [0.000, 0.015] |
| Nausea | ||||||||
| # of Alcohol products | 0.07* | [0.022, 0.148] | 0.09* | [0.047, 0.144] | 0.06* | [0.027, 0.102] | 0.03 | [−0.009, 0.082] |
| # of Cannabis products | 0.02 | [−0.023, 0.063] | 0.01 | [−0.007, 0.025] | 0.01 | [−0.008, 0.029] | 0.01 | [−0.011, 0.044] |
| Hangover | ||||||||
| # of Alcohol products | 0.03* | [0.002, 0.074] | 0.03 | [−0.001, 0.072] | 0.02* | [0.003, 0.054] | 0.01 | [−0.004, 0.040] |
| # of Cannabis products | 0.02 | [−0.011, 0.061] | 0.01 | [−0.004, 0.023] | 0.03 | [−0.010, 0.107] | 0.01 | [−0.006, 0.040] |
| Blackout | ||||||||
| # of Alcohol products | 0.07* | [0.017, 0.159] | 0.09* | [0.035, 0.160] | 0.06* | [0.020, 0.113] | 0.03 | [−0.008, 0.082] |
| # of Cannabis products | 0.03 | [−0.022, 0.095] | 0.01 | [−0.009, 0.036] | 0.01 | [−0.009, 0.041] | 0.01 | [−0.016, 0.059] |
|
| ||||||||
| Level-2 Effects | ||||||||
|
| ||||||||
| Number of consequences | ||||||||
| # of Alcohol products | 0.01 | [−0.020, 0.044] | 0.01 | [−0.015, 0.037] | 0.00 | [−0.010, 0.024] | 0.00 | [−0.011, 0.024] |
| # of Cannabis products | 0.01 | [−0.019, 0.048] | 0.00 | [−0.006, 0.014] | 0.00 | [−0.008, 0.010] | 0.00 | [−0.010, 0.027] |
| Nausea | ||||||||
| # of Alcohol products | 0.01 | [−0.079, 0.112] | 0.01 | [−0.065, 0.091] | 0.01 | [−0.040, 0.060] | 0.00 | [−0.036, 0.062] |
| # of Cannabis products | 0.00 | [−0.089, 0.095] | 0.00 | [−0.022, 0.025] | 0.00 | [−0.020, 0.020] | 0.00 | [−0.043, 0.049] |
| Hangover | ||||||||
| # of Alcohol products | 0.05 | [−0.023, 0.189] | 0.07 | [−0.004, 0.168] | 0.01 | [−0.004, 0.026] | 0.01 | [−0.036, 0.106] |
| # of Cannabis products | −0.02 | [−0.132, 0.073] | −0.00 | [−0.032, 0.022] | 0.00 | [−0.025, 0.021] | −0.00 | [−0.065, 0.039] |
| Blackout | ||||||||
| # of Alcohol products | 0.01 | [−0.138, 0.177] | 0.02 | [−0.110, 0.153] | 0.01 | [−0.061, 0.107] | 0.00 | [−0.064, 0.101] |
| # of Cannabis products | 0.04 | [−0.083, 0.214] | 0.00 | [−0.025, 0.061] | 0.00 | [−0.034, 0.043] | 0.01 | [−0.046, 0.118] |
Note. IE = indirect effect; 95% CI = 95% Bayesian credibility interval. Level-1 = within-person; Level-2 = between-person. Nausea, hangover, and blackout modeled as binary (yes/no). All models include the following covariates: age, sex, school (recruitment site), day of the week, other drug use, number of drinks, and number of cannabis uses. IEs are unstandardized.
*
indicate significant effects, such that credibility intervals do not overlap zero.