Table 2.
Descriptive Statistics by Wave and Gender
| Smoking | Drinking | Delinquency | |||||
|---|---|---|---|---|---|---|---|
| Girls | Boys | Girls | Boys | Girls | Boys | ||
| 6th Grade | 0.045 | 0.051 | 0.089 | 0.124 | 6th Grade | 1.394 | 1.781 |
| (Fall) | (0.266) | (0.281) | (0.343) | (0.417) | (Fall) | (0.776) | (1.005) |
| None | 96.58% | 96.08% | 92.57% | 90.65% | None | 74.91% | 54.33% |
| Once | 1.69% | 2.14% | 5.28% | 5.80% | One | 13.77% | 22.21% |
| More | 1.39% | 1.49% | 1.81% | 3.27% | 2–3 | 7.39% | 13.86% |
| More | 3.57% | 9.30% | |||||
| 6th Grade | 0.070 | 0.078 | 0.131 | 0.172 | 6th Grade | 1.463 | 1.863 |
| (Spr) | (0.338) | (0.359) | (0.418) | (0.487) | (Spr) | (0.859) | (1.069) |
| None | 95.32% | 94.76% | 89.68% | 87.29% | None | 72.53% | 52.65% |
| Once | 2.09% | 2.20% | 7.00% | 7.72% | One | 13.39% | 19.92% |
| More | 2.46% | 2.81% | 3.03% | 4.71% | 2–3 | 8.39% | 15.07% |
| More | 5.34% | 11.99% | |||||
| 7th Grade | 0.155 | 0.131 | 0.240 | 0.254 | 7th Grade | 1.650 | 1.985 |
| (0.503) | (0.465) | (0.568) | (0.588) | (1.006) | (1.122) | ||
| None | 90.30% | 91.51% | 82.81% | 82.01% | None | 64.56% | 48.14% |
| Once | 3.29% | 2.82% | 9.91% | 9.71% | One | 14.70% | 19.97% |
| More | 6.09% | 5.11% | 6.99% | 7.76% | 2–3 | 10.96% | 16.10% |
| More | 9.35% | 15.27% | |||||
| 8th Grade | 0.251 | 0.183 | 0.406 | 0.376 | 8th Grade | 1.848 | 2.128 |
| (0.628) | (0.549) | (0.712) | (0.699) | (1.110) | (1.187) | ||
| None | 84.75% | 88.76% | 72.16% | 74.48% | None | 56.25% | 44.33% |
| Once | 4.49% | 3.02% | 13.87% | 12.10% | One | 15.37% | 17.59% |
| More | 10.26% | 7.56% | 13.21% | 12.60% | 2–3 | 14.13% | 17.23% |
| More | 13.53% | 19.89% | |||||
| 9th Grade | 0.355 | 0.279 | 0.583 | 0.550 | 9th Grade | 1.959 | 2.156 |
| (0.733) | (0.665) | (0.812) | (0.817) | (1.146) | (1.221) | ||
| None | 79.66% | 83.58% | 62.22% | 65.55% | None | 51.53% | 45.15% |
| Once | 4.58% | 3.85% | 16.60% | 12.85% | One | 16.54% | 15.95% |
| More | 15.37% | 11.95% | 20.68% | 20.85% | 2–3 | 15.55% | 15.80% |
| More | 15.97% | 22.39% | |||||
| All Waves | 0.185 | 0.154 | 0.300 | 0.304 | All Waves | 1.676 | 1.992 |
| (0.549) | (0.505) | (0.634) | (0.645) | (1.021) | (1.138) | ||
| None | 88.94% | 90.67% | 79.23% | 79.45% | None | 63.39% | 48.64% |
| Once | 3.31% | 2.84% | 10.79% | 9.82% | One | 14.82% | 18.99% |
| More | 7.41% | 6.00% | 9.53% | 10.19% | 2–3 | 11.48% | 15.69% |
| More | 9.85% | 16.09% | |||||
Notes: Bolded means indicate a p <0.05 significant difference in means between girls and boys, according to a paired t-test.