Table 3.
Age of first marijuana use associated with early adolescence personality disorder (PD): Cox regression analyses (N = 749)
| Predictor | First age (SE) | Hazard Ratio | 95% CI | P |
|---|---|---|---|---|
| No PD | 18.63 (0.27) | |||
| In separate models | ||||
| Paranoid PD | 14.86 (0.55) | 1.73 | 1.02 – 2.93 | < .05 |
| Schizoid PD | 15.93 (0.36) | 0.84 | 0.43 – 1.64 | 0.61 |
| Schizotypal PD | 15.36 (0.84) | 1.75 | 0.99 – 3.08 | 0.05 |
| Borderline PD | 16.51 (1.01) | 2.22 | 1.43 – 3.46 | <.01 |
| Histrionic PD | 16.09 (0.56) | 1.35 | 0.93 – 1.97 | 0.12 |
| Narcissistic PD | 15.40 (0.57) | 1.35 | 0.88 – 2.05 | 0.17 |
| Avoidant PD | 15.04 (0.46) | 1.16 | 0.68 – 1.98 | 0.59 |
| Dependent PD | 16.17 (0.73) | 1.26 | 0.78 – 2.03 | 0.35 |
| Obsessive-Compulsive PD | 15.68 (0.38) | 0.93 | 0.59 – 1.49 | 0.77 |
| Passive-Aggressive PD | 15.45 (0.73) | 1.55 | 0.93 – 2.58 | 0.09 |
| Conduct Disorder | 13.64 (0.65) | 3.32 | 1.80 – 6.11 | <.01 |
| Simultaneous Model of all PDs | ||||
| Borderline PD | 1.73 | 1.07 – 2.79 | < .05 | |
| Conduct Disorder | 2.59 | 1.47 – 4.55 | <.01 | |
Note: Separate models compare each PD and conduct disorder with the group without PD (n=567). The simultaneous model included all PDs; only statistically significant effects of PDs are reported.