Characteristics of teens and parents‡ in dyads assigned to the intervention arm of the TDP randomised trial
| Teen characteristics* | n=107 |
|---|---|
| Age, years; median (IQR) | 16.2 (16.1, 16.5) |
| Behind-the-wheel practice hours at enrolment, median (IQR) | 2.0 (0.5, 3.0) |
| Gender (number (%)) | |
| Male | 47 (43.9) |
| Race (number (%)) | |
| Black or African–American | 5 (4.7) |
| White | 97 (90.6) |
| Other/multiple race | 5 (4.7) |
| Ethnicity (number (%)) | |
| Non-Hispanic | 104 (97.2) |
| Hispanic | 2 (1.9) |
| Unsure/refused | 1 (1.0) |
| Parent characteristics† | |
| Relation to teen (number (%)) | |
| Mother | 80 (74.8) |
| Previous experience teaching a teen to drive (number (%)) | |
| Yes | 46 (44.7) |
| No | 57 (55.3) |
| Missing | 4 |
| Marital status (number (%)) | |
| Not married | 9 (8.4) |
| Married | 98 (91.6) |
| Education (number (%)) | |
| Some college or less | 32 (29.9) |
| College graduate | 48 (44.9) |
| Graduate degree | 27 (25.2) |
| Internet/email home use (number (%)) | |
| Several times a day | 83 (77.6) |
| About once a day | 16 (14.9) |
| 3–5 days a week | 5 (4.7) |
| 1–2 days a week or fewer | 3 (2.8) |
| Internet/email work use (number (%)) | |
| Several times a day | 74 (71.1) |
| About once a day | 4 (3.9) |
| 3–5 days a week | 2 (1.9) |
| 1–2 days a week or fewer | 24 (23.1) |
| Missing | 3 |
*Reported by teen.
†Reported by parent.
‡Denominator for percent excludes missing data. Due to rounding, percent may not sum to 100%.
TDP, TeenDrivingPlan.