Table II.
Regression Results Examining Linear and Quadratic Associations Among Popularity, Cigarette and Marijuana Use
| Cigarette use |
Marijuana use |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Step statistics |
Final statistics |
Step statistics |
Final statistics |
|||||||||||
| Predictors | ΔR2 | b (SE b) | β | t | b (SE b) | β | t | ΔR2 | b (SE b) | β | T | b (SE b) | β | T |
| Step 1 | .37*** | .21*** | ||||||||||||
| Time 1 variable | .84 (.06) | .61 | 14.12*** | .84 (.06) | .61 | 13.07*** | .66 (.07) | .46 | 9.44*** | .64 (.07) | .45 | 8.97*** | ||
| Step 2 | .01 | .01 | ||||||||||||
| Gender (male = 0) | .00 (.02) | .00 | 0.06 | .01 (.02) | .03 | 0.72 | −.04 (.02) | −.09 | −1.91 | −.04 (.02) | −.09 | −1.65 | ||
| Aggression | .03 (.01) | .10 | 2.06* | .04 (.02) | .13 | 2.42* | .03 (.02) | .09 | 1.70 | −.00 (.02) | −.00 | −0.04 | ||
| Step 3 | .00 | .02* | ||||||||||||
| Popularity (pop) | −.00 (.01) | −.02 | −0.38 | .05 (.02) | .25 | 2.29* | .03 (.01) | .14 | 2.58* | .10 (.03) | .48 | 3.97*** | ||
| Step 4 | .02** | .02** | ||||||||||||
| Popularity × gender | −.07 (.02) | −.30 | −2.90** | −.08 (.02) | −.34 | −3.30** | −.08 (.03) | −.33 | −2.95** | −.08 (.03) | −.36 | −3.11** | ||
| Step 5 | .02** | .00 | ||||||||||||
| Popularity × popularity | −.01 (.00) | −.15 | −3.05** | −.01 (.00) | −.16 | −3.22** | .00 (.00) | .01 | 0.20 | .00 (.00) | .00 | 1.07 | ||
| Step 6 | .01 | .00 | ||||||||||||
| Pop × pop × gender | −.02 (.01) | −.08 | −1.60 | −.02 (.02) | −.07 | −1.22 | ||||||||
| Total R2 | .41*** | .26*** | ||||||||||||
Note. *p < .05; **p < .01; ***p < .001.