Table 4.
Regression analyses testing for mediation: (1) effect of anxious arousal on frequency of marijuana use after controlling for covariates, (2) effect of anxious arousal on coping motives (mediator) after controlling for covariates, (3) effect of coping motives on frequency of marijuana use after controlling for anxious arousal and other covariates, and (4) effect of anxious arousal on frequency of marijuana use after controlling for coping motives and other covariates
| Independent variable(s) | Dependent variable | β | F |
| 1. Cigs/day (Step 1) | Frequency of marijuana use | .11 | 5.67† |
| Alcohol (Step 1) | .30 | ||
| Gender (Step 1) | −.04 | ||
| MASQ-AA | .19 | 5.02* | |
| 2. Cigs/day (Step 1) | Coping motives | .31 | 6.34† |
| Alcohol (Step 1) | .23 | ||
| Gender (Step 1) | .14 | ||
| MASQ-AA | .31 | 14.46† | |
| 3. Cigs/day (Step 1) | Frequency of marijuana use | .07 | 5.64† |
| Alcohol (Step 1) | .30 | ||
| Gender (Step 1) | −.02 | ||
| MASQ-AA (Step 1) | .19 | ||
| Coping motives | .30 | 12.07† | |
| 4. Cigs/day (Step 1) | Frequency of marijuana use | .01 | 8.80† |
| Alcohol (Step 1) | .22 | ||
| Gender (Step 1) | −.10 | ||
| Coping Motives (Step 1) | .33 | ||
| MASQ-AA | .09 | 1.25 |
Notes: β = standardized beta weight provided for hierarchical multiple regression; F = change in F statistic provided for hierarchical multiple regression (only one F statistic is reported for each step); cigs/day = average number of cigarettes smoked per day; alcohol = alcohol consumption (Frequency × Quantity); coping motives = Marijuana Motives Measure–coping subscale (Simons et al., 1998); MASQ-AA = Mood and Anxiety Symptom Questionnaire–anxious arousal subscale (Watson et al., 1995).
p < .05;
p < .01.