Table 1.
Age of First Substance Use for Overall Sample and by Sex
| Total Sample | Men | Women | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Substance | N | M | SD | N | M | SD | N | M | SD | F |
| Alcohol | 179 | 12.7 | 4.3 | 140 | 12.7 | 4.3 | 39 | 12.8 | 4.3 | .03 |
| Marijuana | 136 | 15.9 | 5.2 | 102 | 15.3 | 4.4 | 34 | 17.6 | 6.8 | 5.10 |
| Cocaine | 117 | 21.8 | 7.9 | 88 | 21.7 | 8.1 | 29 | 22.1 | 7.3 | .05 |
| Amphetamines | 72 | 20.7 | 7.3 | 52 | 20.2 | 6.2 | 20 | 22.1 | 9.7 | .89 |
| Narcotics | 33 | 20.1 | 6.3 | 28 | 21.1 | 6.2 | 5 | 14.2 | 2.6 | 5.94 |
| Benzodiazepinesa | 49 | 22.6 | 8.4 | 34 | 20.6 | 7.0 | 15 | 27.0 | 9.7 | 6.75 |
| PCP | 17 | 21.1 | 6.6 | 14 | 21.0 | 5.5 | 3 | 21.3 | 12.3 | .00 |
| Barbiturates | 11 | 17.0 | 4.4 | 8 | 17.8 | 4.6 | 3 | 15.0 | 3.6 | .85 |
| Inhalants | 16 | 13.6 | 3.9 | 14 | 14.0 | 4.0 | 2 | 11.0 | 0.0 | 1.06 |
| Hallucinogens | 51 | 18.2 | 4.5 | 44 | 18.1 | 4.4 | 7 | 19.1 | 5.6 | .34 |
| Pain Medication | 44 | 23.7 | 9.8 | 31 | 23.4 | 9.6 | 13 | 24.5 | 10.4 | .11 |
| Muscle Relaxers | 23 | 26.7 | 11.2 | 13 | 25.7 | 11.6 | 10 | 28.0 | 11.3 | .23 |
a
sex effect, p ≤ .01.