Skip to main content
. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Drug Alcohol Depend. 2011 May 28;118(2-3):408–416. doi: 10.1016/j.drugalcdep.2011.04.021

Table 2.

Correlations Among End-of-Treatment Outcomes.

MTP Outcome 1 2 3 4 5 6 7
1. # Days of MJ Use in Last Week of Treatment
2. % Days of MJ Abstinence in Prior 90 Days -.86*
3. Max # Consecutive Days of MJ Abstinence during Treatment -.66* .76*
4. ASI Drug Composite Scorea .69* -.74* -.57*
5. MPS Score .42* -.50* -.49* .57*
6. ASI Psychological Composite Score .19* -.19* -.12 .32* .33*
7. Anxiety Score (STAI) .26* -.31* -.23* .45* .38* .44*
8. Depression Score (BDI) .27* -.33* -.27* .42* .44* .49* .66*
MJ Yale Outcome 1 2 3 4 5 6 7 8 9

1. # Days of MJ Use in Last Week of Treatment
2. % Days of MJ Abstinence during Treatment -.73*
3. Max # Consecutive Days of MJ Abstinence during Treatment -.59* .76*
4. % MJ-Negative Urines during Treatment -.51* .59* .80*
5. Max # Consecutive MJ-Negative Urines during Treatment -.48* .58* .84* .92*
6. ASI MJ Composite Scorea .48* -.68* -.60* -.60* -.57*
7. MPS Score .27 -.25 -.20 -.21 -.21 .36*
8. ASI Psychological Composite Score .22 -.13 -.25 -.12 -.19 .07 -.05
9. Anxiety Score (BSI) .23 -.06 -.08 -.08 -.05 .05 .13 .26
10. Depression Score (BSI) .28 -.03 -.08 -.13 -.13 .08 .19 .33 .61*

Note. Pearson correlations are presented for end-of-treatment (16 weeks after the start of treatment in MTP, 8 weeks after the start of treatment in MJ Yale) outcomes. Participants with available data on all outcomes were included (N = 234 for MTP, N = 55 for MJ Yale). MJ = marijuana, MTP = Marijuana Treatment Project, MJ Yale = Contingency Management/MET/CBT Study, ASI = Addiction Severity Index, MPS = Marijuana Problems Scale, STAI = State Trait Anxiety Inventory; BDI = Beck Depression Inventory – Second Edition, BSI = Brief Symptom Inventory.

*

p < .01.

a

In the MJ Yale study, the ASI was revised to gather composite scores for marijuana use only. In MTP, the ASI gathered composite scores for all drug use.