Table 1.
Wave 7 frequencies of DWI, RWI, and demographic variables
| N | Weighted % | 95% CI | ||
|---|---|---|---|---|
| DWI | ||||
| No | 1311 | 76.50 | 72.72 | 80.28 |
| Yes | 438 | 23.50 | 19.72 | 27.28 |
| RWI | ||||
| No | 1539 | 67.58 | 64.01 | 71.16 |
| Yes | 754 | 32.42 | 28.84 | 35.99 |
| Delay in driving licensure$ | ||||
| No | 560 | 30.71 | 21.52 | 39.91 |
| Delay 1-2 years | 887 | 38.93 | 31.22 | 46.64 |
| Delay >2 years | 1078 | 30.36 | 22.96 | 37.76 |
| Delay in driving licensure$ | ||||
| No | 560 | 30.71 | 21.52 | 39.91 |
| Yes | 1965 | 69.29 | 60.94 | 78.48 |
| Race/ethnicity | ||||
| Latinos | 695 | 19.55 | 12.03 | 27.08 |
| African Americans | 595 | 19.32 | 9.58 | 29.07 |
| Whites | 914 | 56.61 | 44.28 | 68.95 |
| Other | 113 | 4.51 | 2.09 | 6.93 |
| Sex | ||||
| Female | 1347 | 58.70 | 55.08 | 62.33 |
| Male | 976 | 41.30 | 37.67 | 44.92 |
| Family Affluence | ||||
| Low | 648 | 23.17 | 17.55 | 28.78 |
| Moderate | 986 | 48.67 | 45.13 | 52.20 |
| High | 458 | 28.17 | 22.55 | 33.78 |
| Urbanicity | ||||
| Urban | 761 | 13.79 | 0.00 | 28.27 |
| Suburban/rural | 1341 | 86.21 | 71.73 | 100 |
| Highest Education of either parent | ||||
| High school or lower | 809 | 32.74 | 26.81 | 38.68 |
| Some college | 784 | 39.54 | 35.14 | 43.94 |
| Bachelor or higher | 528 | 27.72 | 20.76 | 34.68 |
| Participant highest education by W7 | ||||
| High school or lower | 707 | 31.99 | 27.75 | 36.23 |
| Some college | 1035 | 45.31 | 40.65 | 49.97 |
| Bachelor or higher | 551 | 22.70 | 17.02 | 28.38 |
| Family structure | ||||
| Both biological | 1118 | 53.13 | 48.63 | 57.62 |
| Biological + stepparent | 324 | 18.31 | 15.89 | 20.73 |
| Single parent | 427 | 19.75 | 16.52 | 22.99 |
| Other | 224 | 8.81 | 6.89 | 10.73 |
| Onset age of alcohol use# | ||||
| ≥ 14 years | 1552 | 75.95 | 72.50 | 79.39 |
| 14 or younger | 447 | 24.05 | 20.61 | 27.50 |
| MLDA-21 overall score | ||||
| < 0.44 | 1293 | 46.10 | 32.32 | 59.89 |
| ≥ 0.44 | 1482 | 53.90 | 40.11 | 67.68 |
CI: confidence interval; MLDA-21: minimum legal drinking age 21; DWI: driving while impaired; RWI: riding with an impaired driver.
$
Among those who were eligible to obtain driver’s license, the percentages of participants who did not get their licenses are 36.3% in W1, 35.3% in W2, 40.1% in W3, 30.5% in W4, 29.9% in W5, 19.6% in W6, and 27.4% in W7.
#
The mean of onset age of alcohol use was 14.39 (SE = 0.07).