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. 2011 Aug 18;36(9):980–990. doi: 10.1093/jpepsy/jsr053

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.