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.
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.