Table 1.
Description of Study Variables (Unweighted)
| One-Year | Six-Year | |
|---|---|---|
| Variable | Mean (SD) or Proportion | Mean (SD) or Proportion |
| Neighborhood Characteristics | ||
| Neighborhood Disadvantage Scale | 0.00 (0.96) | −0.01 (0.94) |
| Neighborhood Cohesiveness | 0.66 (0.47) | 0.66 (0.47) |
| Perceived Safety | 0.86(0.34) | 0.86(0.35) |
| Selected Neighborhood | 0.78(0.41) | 0.79(0.41) |
| Moved Between Waves | 0.07 (0.25) | 0.06(0.25) |
| Personal Demographics | ||
| Male | 0.58 (0.49) | 0.55(0.50) |
| Age | 15.89(1.30) | 15.87(1.29) |
| Black | 0.16(0.37) | 0.16(0.37) |
| Hispanic | 0.20 (0.40) | 0.18(0.39) |
| Other Race (reference category = white) | 0.10(0.30) | 0.11 (0.32) |
| Household Income | 46.35 (59.37) | 47.50(61.29) |
| Mother's Education | 3.98(1.55) | 3.98(1.59) |
| Both Parents In Home | 0.57(0.50) | 0.61 (0.49) |
| Grandmother in Household | 0.06 (0.24) | 0.06(0.25) |
| Friends | ||
| Proportion School Friends Using Marijuana | 0.22 (0.35) | 0.22(0.35) |
| Proportion School Friends Binge Drinking | 0.30(0.39) | 0.28(0.38) |
| Only Outside-of-School Friends | 0.20 (0.40) | 0.20 (0.40) |
| Best Friend a "Good Influence" | 0.47 (0.50) | 0.48(0.50) |
| Behavioral and Family Risk Factors | ||
| Respondent Monthly Marijuana Use at Wave 1 | 20.76 (43.52) | 20.81 (45.83) |
| Respondent Monthly Binge Drinking at Wave 1 | 3.68(6.41) | 3.63 (6.52) |
| Trouble at School | 6.11(3.11) | 6.10(3.03) |
| Delinquency | 10.07(7.53) | 10.14(7.52) |
| Low School Participation | 0.26 (0.44) | 0.25 (0.43) |
| Low Parental Control | 5.35(1.70) | 5.34(1.71) |
| Closeness to Mother | 4.03 (1.38) | 4.01 (1.36) |
| Drugs Available In Home | 0.12(0.32) | 0.12(0.33) |
| Alcohol Available In Home | 0.34 (0.47) | 0.36(0.48) |
| N | 458 | 358 |