Table 2.
Means (standard deviation) and prevalences (number) of middle school characteristics and marijuana involvement behaviors from 6th through 8th grade. Data are from the Baltimore Prevention Research Center at Johns Hopkins University, 1998-2000.
| Characteristic/Behavior | 6th Grade N=454 | 7th Grade N=471 | 8th Grade N=473 |
|---|---|---|---|
| Parent Monitoring1 | 1.99 (0.66) | 2.00 (0.72) | 2.07 (0.68) |
| Deviant Peer Affiliation2 | 1.68 (0.61) | 1.51 (0.61) | 1.59 (0.63) |
| Neighborhood Disadvantage3 | 1.81 (0.63) | 1.71 (0.62) | 1.73 (0.63) |
| Ever offered marijuana | |||
| Yes | 14.5% (66) | 28.5% (134) | 44.0% (208) |
| No | 85.5% (388) | 71.5% (337) | 56.0% (265) |
| Ever used marijuana | |||
| Yes | 4.0% (18) | 11.7% (55) | 20.9% (99) |
| No | 96.0% (436) | 88.3% (416) | 79.1% (374) |
| Used marijuana > 2 times | |||
| Yes | 1.0% (4) | 3.8% (18) | 8.7% (41) |
| No | 99.0% (450) | 96.2% (453) | 91.3% (432) |
| Social problems from marijuana use | |||
| Yes | 2.6% (12) | 9.1% (43) | 16.9% (80) |
| No | 97.4% (442) | 90.9% (428) | 83.1% (393) |
| Health problems from marijuana use | |||
| Yes | 1.0% (4) | 3.4% (16) | 7.0% (33) |
| No | 99.0% (450) | 96.6% (455) | 93.0% (440) |
1
1=all of the time, 2=most times, 3=sometimes, 4=hardly ever, 5=never
2
1=none, 2=very few, 3=some, 4=most of them, 5=all of them
3
1=not at all true, 2=a little true, 3=sort of true, 4=very true