Table 2.

Participant demographic characteristics as of the March 2021 launch of the earlier RCT. The present study launched July 2022, so mean age at time of participation was more than 1 year older.

Age (mean (SD))	33.2 (6.9)
Sex (%)
Female	37 (64.9)
Male	20 (35.1)
Marital status (%)
Married	13 (22.8)
Single	44 (77.2)
Race (%)
White or Caucasian	40 (70.2)
Black or African American	13 (22.8)
American Indian or Alaska Native	1 (1.8)
Asian or Asian American	3 (5.3)
Undisclosed	1 (1.8)
Hispanic ethnicity (%)	4 (7.0)
Education completed (%)
High school degree or equivalent	6 (10.5)
Some college	13 (22.8)
College degree	22 (38.6)
Some graduate	2 (3.5)
Post-graduate degree	14 (24.6)
Years of licensure (%)
0 to 4	2 (3.5)
5 to 9	16 (28.1)
10 to 14	15 (26.3)
15 or more	24 (42.1)
Crashes in prior 5 years (%)
0	36 (63.2)
1	16 (28.1)
2	3 (5.3)
3 or more	2 (3.5)