Table 2.
Descriptive statistics for all variables used in the analysis
| Mean/% | SD/N | |
|---|---|---|
| Genotype | ||
| DAT1 (10R/10R) | 0.61 | 441 |
| (10R/9R) | 0.34 | 248 |
| (9R/9R) | 0.05 | 34 |
| DRD2 (A1/A1) | 0.06 | 43 |
| (A1/A2) | 0.34 | 246 |
| (A2/A2) | 0.60 | 435 |
| Sociodemographic and background controls | ||
| Male | 0.59 | 427 |
| Non-White | 0.16 | 116 |
| Parent college graduate | 0.35 | 253 |
| Parent unemployed | 0.06 | 43 |
| Parent below poverty | 0.16 | 116 |
| Household Size | 5.10 | 1.69 |
| GPA | 2.68 | 0.71 |
| Social control mechanisms | ||
| Family closeness | 20.04 | 2.90 |
| School attachment | 21.96 | 3.31 |
| Social risk mechanisms | ||
| Neighborhood disorganization | 7.29 | 1.85 |
| Peer delinquency | 16.65 | 5.73 |
Note: Data come from 9 waves of the National Youth Survey Family Study (NYSFS). N = 724. Cell entries represent means and standard deviations (for continuous variables) and percents and N size for categorical variables.