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.

^aIn 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.