Table 2.
Motives predicting heavy episodic drinking (HED), number of drinks, and number of hours high from marijuana
| Predictor | Estimate (SE) | t | p |
| Outcome: HED | |||
| Level 2 (between person) | |||
| Male sex | -0.38 (0.22) | -1.72 | .086 |
| Attending 4-year college (vs. not) | 0.17 (0.23) | 0.77 | .441 |
| Coping (person mean) | -0.45 (0.23) | -1.96 | .050 |
| Social (person mean) | 0.99 (0.18) | 5.58*** | <.001 |
| Enhancement (person mean) | 0.10 (0.17) | 0.61 | .544 |
| Conformity (person mean) | -0.06 (0.21) | -0.28 | .782 |
| Level 1 (within person) | |||
| Day in study (0 to 13) | 0.03 (0.01) | 1.87 | .062 |
| Weekend (vs. not) | 0.78 (0.12) | 6.51*** | <.001 |
| Coping (person centered) | -0.05 (0.13) | -0.37 | .708 |
| Social (person centered) | 0.98 (0.08) | 12.42*** | <.001 |
| Enhancement (person centered) | 0.55 (0.09) | 5.95*** | <.001 |
| Conformity (person centered) | 0.13 (0.10) | 1.24 | .216 |
| Outcome: Number of drinks | |||
| Level 2 (between person) | |||
| Male sex | 0.03 (0.08) | 0.37 | .711 |
| Attending 4-year college (vs. not) | -0.03 (0.08) | -0.40 | .692 |
| Coping (person mean) | -0.19 (0.08) | -2.32* | <.05 |
| Social (person mean) | 0.44 (0.06) | 6.88*** | <.001 |
| Enhancement (person mean) | -0.08 (0.06) | -1.26 | .209 |
| Conformity (person mean) | 0.02 (0.08) | 0.26 | .792 |
| Level 1 (within person) | |||
| Day in study (0 to 13) | 0.01 (0.003) | 2.74** | <.01 |
| Weekend (vs. not) | 0.29 (0.03) | 11.53*** | <.001 |
| Coping (person centered) | -0.02 (0.03) | -0.58 | .561 |
| Social (person centered) | 0.38 (0.02) | 24.75*** | <.001 |
| Enhancement (person centered) | 0.09 (0.02) | 4.43*** | <.001 |
| Conformity (person centered) | 0.04 (0.02) | 2.08* | <.05 |
| Outcome: Number of hours high | |||
| Level 2 (between person) | |||
| Male sex | 0.32 (0.10) | 3.22** | <.01 |
| Attending 4-year college (vs. not) | 0.16 (0.10) | 1.63 | .105 |
| Coping (person mean) | 0.61 (0.10) | 5.98*** | <.001 |
| Social (person mean) | -0.68 (0.08) | -8.44*** | <.001 |
| Enhancement (person mean) | 0.48 (0.08) | 6.36*** | <.001 |
| Conformity (person mean) | -0.22 (0.10) | -2.29* | <.05 |
| Level 1 (within person) | |||
| Day in study (0 to 13) | 0.003 (0.003) | 1.10 | .270 |
| Weekend (vs. not) | 0.02 (0.02) | 0.85 | .393 |
| Coping (person centered) | 0.05 (0.02) | 1.94 | .052 |
| Social (person centered) | -0.06 (0.01) | -4.03*** | <.001 |
| Enhancement (person centered) | 0.22 (0.02) | 12.69*** | <.001 |
| Conformity (person centered) | 0.01 (0.02) | 0.63 | .527 |
Notes: Days were included in the model if participants reported either alcohol and/or marijuana use. For the two alcohol outcomes, 3,157 days were nested in 399 participants; for the marijuana outcome, 3,148 days were nested in 399 participants. HED was modeled as a binary outcome. Number of drinks and number of hours high from marijuana were modeled with a Poisson distribution. Current education status was coded as 1 (attending a 4-year college or university) and 0 (all other options). Weekend refers to the day on which the behavior occurred (i.e., alcohol or marijuana use) and was coded 1 (Thursday, Friday, Saturday) and 0 (all other days).
p < .05;
p < .01;
p < .001.