# Table 3 Hierarchical Multiple Regression Analyses with the UPPS Subscales and Delay Discounting predicting the Degree of Substance Use and Substance-Related Problems

Predictors Degree of substance use Substance-related problems
ΔR2 F B SE β ΔR2 F B SE β
Step 1 .087** 24.45     .017* 4.432 4
Male gender    11.57 2.34 .30**    0.75 0.35 .13*
Step 2       .305** 114.22
Male gender         −0.23 0.31 −.04
Degree of substance use         0.08 0.01 .58**
Step 3 - UPPS .144** 11.70     .068** 6.99
Male gender    7.38 2.52 .19**    −0.06 0.33 −.01
Degree of substance use         0.07 0.01 .49**
Urgency    0.52 0.21 .16*    0.11 0.03 .23**
Premeditation    −0.09 0.28 −.02    −0.04 0.04 −.06
Perseverance    0.64 0.28 .15*    0.06 0.04 .10
Sensation seeking    0.83 0.18 .31**    0.03 0.02 .07
Step 4 - MCQ .022** 7.26     .001 0.30
Male gender    6.40 2.51 .16*    −0.08 0.34 −.01
Degree of substance use         0.07 0.01 .48**
Urgency    0.43 0.21 .13*    0.11 0.03 .22**
Premeditation    −0.08 0.27 −.02    −0.04 0.04 −.06
Perseverance    0.67 0.27 .15*    0.07 0.04 .10
Sensation seeking    0.86 0.17 .32**    0.03 0.02 .08
Log(k)    3.88 1.44 .15**    0.10 0.19 .03
Total R2 .253** 14.08     .391** 22.83
1. Note. ΔR2 = change in proportion of explained variance; B = unstandardized estimate; SE = standard error of B, β = standardized estimate. * p < .05. ** p < .01