Table 4.
Multivariable wave-level associations between social roles and driving after marijuana use and 5+ drinking among U.S. young adults ages 19–30: Mediation via frequency of evenings out
| X (independent variable) | a (XàMediator) Est. [95% CI] | b (MediatoràOutcome) AOR [95% CI] | c′ (XàOutcome) AOR [95% CI] | (a*b) Indirect AOR [95% CI] |
|---|---|---|---|---|
| Drive after marijuana use | ||||
| Live with parents (vs. other) | 0.344 [0.250, 0.438] | 1.38 [1.14, 1.68] | 1.39 [0.77, 2.50] | 1.12 [1.04, 1.21] |
| Married (vs. other) | -0.763 [-0.851, -0.675] | 1.38 [1.14, 1.68] | 0.44 [0.22, 0.89] | 0.78 [0.67, 0.91] |
| Parent (vs. other) | -0.605 [-0.701, -0.509] | 1.38 [1.14, 1.68] | 0.83 [0.40, 1.71] | 0.82 [0.72, 0.92] |
| Attendance (vs. not attending) | ||||
| Part time | 0.157 [0.030, 0.284] | 1.38 [1.14, 1.68] | 0.98 [0.46, 2.08] | 1.05 [1.01, 1.12] |
| Full time | 0.544 [0.468, 0.620] | 0.99 [0.53, 1.87] | 1.19 [1.07, 1.34] | |
| Employment (vs. not employed) | ||||
| Part time | -0.048 [-0.152, 0.056] | 1.38 [1.14, 1.68] | 0.58 [0.31, 1.08] | 0.98 [0.94, 1.02] |
| Full time | -0.408 [-0.504, -0.312] | 0.55 [0.28, 1.08] | 0.88 [0.80, 0.95] | |
| Drive after 5+ drinking | ||||
| Live with parents (vs. other) | 0.344 [0.250, 0.438] | 1.34 [1.15, 1.56] | 1.38 [0.92, 2.05] | 1.11 [1.05, 1.18] |
| Married (vs. other) | -0.763 [-0.851, -0.675] | 1.34 [1.15, 1.56] | 0.73 [0.45, 1.18] | 0.80 [0.71, 0.90] |
| Parent (vs. other) | -0.605 [-0.701, -0.509] | 1.34 [1.15, 1.56] | 0.78 [0.50, 1.22] | 0.84 [0.76, 0.92] |
| Attendance (vs. not attending) | ||||
| Part time | 0.157 [0.030, 0.284] | 1.34 [1.15, 1.56] | 1.73 [0.98, 3.07] | 1.05 [1.01, 1.10] |
| Full time | 0.544 [0.468, 0.620] | 1.43 [0.90, 2.28] | 1.17 [1.08, 1.28] | |
| Employment (vs. not employed) | ||||
| Part time | -0.048 [-0.152, 0.056] | 1.34 [1.15, 1.56] | 1.24 [0.77, 2.01] | 0.99 [0.95, 1.02] |
| Full time | -0.408 [-0.504, -0.312] | 1.73 [1.02, 2.94] | 0.89 [0.83, 0.94] |
Notes: Ns(unwtd.) = 7,037 waves from 1,873 individuals. All estimates obtained from weighted models. OR = bivariate odds ratio; AOR = multivariable odds ratio; CI = confidence interval. Bold font indicates associations significant at p < .05 or stronger. All models simultaneously included all wave-and person-level indicators for all five social roles; wave- and person-level indicators for average miles driven, past-30-day marijuana use frequency, and past-30-day alcohol use frequency; age and age2 at the wave level, and gender and race/ethnicity at the person level. Mediation was tested with one social role per model. All measures person-centered as wave specific value minus personal mean.