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. Author manuscript; available in PMC: 2009 Sep 29.
Published in final edited form as: Drug Alcohol Depend. 2005 Nov 14;83(1):42–48. doi: 10.1016/j.drugalcdep.2005.10.007

Table 4.

Standardized regression coefficients for predictors of marijuana use after release and treatment engagement 2 months into incarceration

Variable Marijuana use index Treatment engagement measure-two months into incarceration
Quantity Frequency Intensity TPQTP TPQTN TPQM
Block 1
     Age −.06 −.01 −.06 .19* −.03 −.17
     Baseline marijuana use index .40** .34** .55** −.13 .21* −.04
Block 2
     Baseline ML −.38** −.41** −.18* .30** −.25** −.06
     R2 change .13** .16** .03* .09** .06** .00
From Blocks 1 to 2
     R2-full model .29** .27** .33** .14** .11* .03

Note: TPQTP: teen's rating of positive treatment engagement; TPQTN: teen's rating of negative treatment engagement; TPQM: social worker's rating of negative treatment engagement; R2: total variance accounted for by the full model; R2 change: change in the total variance accounted for from block one to the full model.

*

p < .05.

**

p < .01.