Table 4.
Personality disorder cluster prevalence based on substance of abuse/dependence.
| Substance Use Disorder | Cluster A disorders (n=60) | Cluster B disorders (n=120) | Cluster C disorders (n=110) | Clus. A p-value | Clus. B p-value | Clus. C p-value | Omnibus Test of Model Coefficients | Cluster A: Odds Ratio (95% CI) | Cluster B: Odds Ratio (95% CI) | Cluster C: Odds Ratio (95% CI) |
|---|---|---|---|---|---|---|---|---|---|---|
| Alcohol | 49 (81.7) | 96 (80.0) | 88 (80.0) | 0.762 | 0.714 | 0.818 | 0.360c, df=3, p=.948 | 1.140 (0.489, 2.661) | 0.792 (0.228, 2.754) | 0.882 (0.302, 2.572) |
| Cannabis | 23 (38.3) | 44 (36.7) | 38 (34.5) | 0.749 | 0.894 | 0.243 | 1.519c, df=3, p=.678 | 1.119 (0.561, 2.231) | 1.068 (0.407, 2.805) | 0.606 (0.262, 1.405) |
| Cocaine, | 24 (40.0) | 46 (38.3) | 42 (38.2) | 0.680 | 0.868 | 0.994 | 0.219c, df=3, p=.974 | 1.155 (0.583, 2.286) | 1.086 (0.411, 2.867) | 1.003 (0.428, 2.352) |
| Opiates | 1 (1.7) | 6 (5.0) | 5 (4.5) | 0.136 | 0.870 | 0.528 | 3.937c, df=3, p=.268 | 0.198 (0.024, 1.663) | 0.859 (0.138, 5.324) | 0.592 (0.116, 3.014) |
| Methamphetamine | 16 (26.7) | 43 (35.8) | 42 (38.2) | 0.046 | 0.743 | 0.219 | 5.427c, df=3, p=.143 | 0.478 (0.232, 0.987) | 0.847 (0.313, 2.289) | 1.770 (0.712, 4.401) |
| Ecstasy | 6 (10.0) | 9 (7.5) | 8 (7.3) | 0.145 | excluded* | 0.412 | 3.316, df=2, p=.191 | 2.906 (0.693, 12.176) | excluded* | 2.434 (0.290, 20.429) |
| Gamma Hydroxy Butyrate (GHB) | 3 (5.0) | 10 (8.3) | 11 (10.0) | 0.211 | 0.657 | 0.166 | 4.198c, df=3, p=.241 | 0.419 (0.107, 1.639) | 0.679 (0.123, 3.748) | 4.721 (0.525, 42.447) |
All values n (%); c=Chi-square
Cluster A: paranoid, schizoid, schizotypal; Cluster B: antisocial, borderline, narcissistic, histrionic; Cluster C: avoidant, dependent, obsessive-compulsive;
*
cluster B excluded (odds ratio denominator = zero). All 9 ecstasy users are in Cluster B. A simple Chi-square of cluster B by ecstasy is not significant p=.157.