Table 2.
Individual variable contributions predicting post-challenge outcomes (female adolescents)
| ΔR2 | T | β | f2 | p | |
|---|---|---|---|---|---|
| Dependent Variable: Post-Challenge Heart Rate | |||||
| Step 1: Covariates | .772 | <.001 | |||
| Baseline heart rate | 12.32 | .83 | 2.62 | <.001 | |
| Age | -2.36 | -.18 | 0.10 | .02 | |
| Trait anxiety | 1.53 | .11 | 0.04 | .13 | |
| Alcohol frequency | .86 | .08 | 0.01 | .39 | |
| Cigarette use | .42 | .04 | 0.00 | .68 | |
| Step 2: Main Effects | .014 | .18 | |||
| Anxiety sensitivity | 1.70 | .14 | 0.05 | .10 | |
| Marijuana frequency | -.86 | -.11 | 0.01 | .40 | |
| Step 3: Interaction Effect | .002 | .43 | |||
| Anxiety sensitivity × Marijuana frequency | -.79 | -.05 | 0.01 | .43 | |
| Dependent Variable: Post-Challenge Skin Conductance | |||||
| Step 1: Covariates | .877 | <.001 | |||
| Baseline skin conductance | 19.97 | .05 | 6.89 | <.001 | |
| Age | .87 | -.06 | 0.01 | .39 | |
| Trait anxiety | -1.09 | -.05 | 0.02 | .28 | |
| Alcohol frequency | -.70 | .04 | 0.01 | .49 | |
| Cigarette frequency | -1.32 | -.08 | 0.03 | .19 | |
| Step 2: Main Effects | .004 | .36 | |||
| Anxiety sensitivity | .86 | .05 | 0.01 | .39 | |
| Marijuana frequency | 1.11 | .11 | 0.02 | .27 | |
| Step 3: Interaction Effect | .015 | .006 | |||
| Anxiety sensitivity × Marijuana frequency | 2.85 | .13 | 0.15 | .006 | |
| Dependent Variable: Post-Challenge API-Physical | |||||
| Step 1: Covariates | .221 | <.01 | |||
| Age | -.96 | -.13 | 0.02 | .34 | |
| Trait anxiety | 3.23 | .44 | 0.17 | .002 | |
| Alcohol frequency | -.71 | -.11 | 0.01 | .48 | |
| Cigarette frequency | -1.63 | -.25 | 0.04 | .11 | |
| Step 2: Main Effects | .027 | .35 | |||
| Anxiety sensitivity | .35 | .05 | 0.00 | .73 | |
| Marijuana frequency | 1.41 | .32 | 0.03 | .16 | |
| Step 3: Interaction Effect | .000 | .91 | |||
| Anxiety sensitivity × Marijuana frequency | .11 | .01 | 0.00 | .91 | |
| Dependent Variable: Post-Challenge API-Cognitive | |||||
| Step 1: Covariates | .295 | <.001 | |||
| Age | -1.53 | -.20 | 0.04 | .18 | |
| Trait anxiety | 4.30 | .55 | 0.30 | <.001 | |
| Alcohol frequency | -.67 | -.10 | 0.01 | .25 | |
| Cigarette frequency | -1.37 | -.20 | 0.03 | .98 | |
| Step 2: Main Effects | .131 | .002 | |||
| Anxiety sensitivity | 2.40 | .31 | 0.10 | .03 | |
| Marijuana frequency | 2.71 | .54 | 0.12 | .001 | |
| Step 3: Interaction Effect | .083 | .003 | |||
| Anxiety sensitivity × Marijuana frequency | 3.13 | .29 | 0.17 | .003 | |
API=Acute Panic Inventory. Anxiety sensitivity was measured using the Childhood Anxiety Sensitivity Index (CASI), trait anxiety was measured using the Spielberger Trait Anxiety Inventory (STAI). β = standardized beta weight provided for multiple regression.