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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Drug Alcohol Depend. 2008 Jul 31;98(3):249–263. doi: 10.1016/j.drugalcdep.2008.06.008

Table 5.

Results of Multinomial Regression Analyses

Mild “+” β SE P >|z| RRR1 95% CI
Site −.192 .141 .173 .826 .627 – 1.088
Gender (male) .014 .234 .950 1.015 .642 – 1.605
Age (older) −.705 .226 .002 .494 .317 – .769
Lifetime Ecstasy Pill Use .476 .206 .021 1.610 1.073 – 2.413
Criminal Behavior Index −.099 .031 .002 .906 .852 – .963
Motivation (contextual cues) .112 .029 <.001 1.119 1.056 – 1.186
CES-D (depressive symptoms) .048 .032 .129 1.049 .986 – 1.116
Intercept −1.470 .484 .002 N/A N/A
Moderate “▲”
Site −.062 .171 .720 .940 .672 – 1.316
Gender (male) .026 .291 .927 1.027 .581 – 1.815
Age (older) −1.04 .284 <.001 .354 .203 – .618
Lifetime Ecstasy Pill Use 1.00 .272 <.001 2.727 1.599 – 4.649
Criminal Behavior Index −.126 .039 .001 .881 .816 – .952
Motivation (contextual cues) .172 .037 <.001 1.187 1.104 – 1.277
CES-D (depressive symptoms) .082 .037 .026 1.086 1.010 – 1.167
Intercept −4.535 .672 <.001 N/A N/A
Severe Dependent “■”
Site .246 .180 .172 1.27 .898 – 1.821
Gender (male) −.602 .305 .048 .548 .301 – .996
Age (older) −1.46 .304 <.001 .232 .128 – .420
Lifetime Ecstasy Pill Use 1.50 .304 <.001 4.47 2.461 – 8.119
Criminal Behavior Index −.179 .043 <.001 .836 .768 – .910
Motivation (contextual cues) .304 .041 <.001 1.36 1.251 – 1.469
CES-D (depressive symptoms) .124 .038 .001 1.13 1.051 – 1.219
Intercept −8.179 .837 <.001 N/A N/A
1

Note. RRR = Relative Risk Ratio of being in the designated cluster versus the clean negatives (Cluster-1).