TABLE 2.
Predicting age of initiation
| Wave 1 measure | N initiated* | N censored† | B | SE | p-Value | Exp(B) |
|---|---|---|---|---|---|---|
| Cigarettes | ||||||
| Sex | 200 | 571 | –.307 | .153 | .044 | .736 |
| Harm avoidance | 200 | 571 | –.941 | .416 | .024 | .390 |
| Novelty seeking | 200 | 571 | 2.230 | .407 | <.001 | 9.303 |
| Reward dependence | 200 | 571 | .018 | .326 | .957 | 1.018 |
| Persistence | 200 | 571 | –1.351 | .289 | <.001 | .259 |
| Alcohol | ||||||
| Sex | 564 | 207 | –.165 | .090 | .065 | .848 |
| Harm avoidance | 564 | 207 | –.397 | .243 | .102 | .672 |
| Novelty seeking | 564 | 207 | 1.099 | .251 | <.001 | 3.001 |
| Reward dependence | 564 | 207 | .186 | .193 | .336 | 1.205 |
| Persistence | 564 | 207 | –.487 | .183 | .008 | .614 |
| Illicit drugs | ||||||
| Sex | 209 | 562 | –.332 | .150 | .027 | .718 |
| Harm avoidance | 209 | 562 | –.812 | .411 | .048 | .444 |
| Novelty seeking | 209 | 562 | 2.572 | .398 | <.001 | 13.09 |
| Reward dependence | 209 | 562 | –.095 | .321 | .767 | .909 |
| Persistence | 209 | 562 | –.578 | .292 | .048 | .561 |
*
Number of subjects who initiated substance
†
Number of subjects who had not initiated substance.